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Coffee Discussion boards => Hardware & Equipment => Topic started by: espressomaker on June 17, 2013, 08:06:44 AM

Title: One Pound Roaster For under 100
Post by: espressomaker on June 17, 2013, 08:06:44 AM
Is there any way to build buy or otherwise aquire a pound roaster for under 100
Title: Re: One Pound Roaster For under 100
Post by: MMW on June 17, 2013, 08:24:16 AM
I'm sure it's doable within the constraints of the engineer's triangle:

(http://www.engineeringexpert.net/Engineering-Expert-Witness-Blog/http://www.engineeringexpert.net/web/Engineering-Expert-Witness-Blog/wp-content/uploads//2010/10/Project_Triangle.png)
Title: Re: One Pound Roaster For under 100
Post by: peter on June 17, 2013, 08:32:31 AM
SC/TO can be built w/ all new parts for right around $100. 

Are you wanting to net 1lb. of roasted out of this idea, or start w/ 1lb.?  Is that magic number written in stone?

What's the reason for 100 as the limit?  Seems arbitrary.  What if you had to spend $109, or $149?  The project would be undoable?
Title: Re: One Pound Roaster For under 100
Post by: MMW on June 17, 2013, 08:38:15 AM
3/4 pound for $149...we're already over budget by 50% and under performing by 25%.  Peter chooses good and fast ;D
Title: Re: One Pound Roaster For under 100
Post by: Burner0000 on June 17, 2013, 09:06:53 AM
SS Whirley POP $43  (http://www.amazon.com/Wabash-Valley-Farms-Sweet-Machine/dp/B003V8Y6LC/ref=sr_1_14?ie=UTF8&qid=1371484539&sr=8-14&keywords=whirley+pop)
1000W portable electric burner $15 (http://www.amazon.com/Proctor-Silex-34101-Proctor-Silex-Burner/dp/B000690WNU/ref=sr_1_3?s=kitchen&ie=UTF8&qid=1371484688&sr=1-3&keywords=single+coil+portable+burner)
$16 Fan (http://www.amazon.com/Kaz-HT-900-Honeywell-TurboForce-Fan/dp/B001R1RXUG/ref=sr_1_3?s=home-garden&ie=UTF8&qid=1371484723&sr=1-3&keywords=fan)
$20 strainer  (http://www.amazon.com/Polder-6631-75-Stainless-Steel-Extending-Rubber-Grip/dp/B00006NWBG/ref=sr_1_13?s=home-garden&ie=UTF8&qid=1371484771&sr=1-13&keywords=sink+strainer)
k-type thermometer $19 (http://www.amazon.com/Channel-Digital-Thermometer-K-Type-Thermocouple/dp/B0084JQL1Q/ref=sr_1_1?s=home-garden&ie=UTF8&qid=1371484825&sr=1-1&keywords=k-type+thermometer)


Total cost $113


Full manual control of heat and air, cooling tray and it can handle 1 LB
Upgrade to the SS Whirley pop for better results for another $30.  This is how I started out about 2 years ago and I gotta say even though I have a Behmor and a Sono I still miss this DIY Setup.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 17, 2013, 09:25:34 AM
3/4 pound for $149...we're already over budget by 50% and under performing by 25%.  Peter chooses good and fast ;D

You will use it, and you will like it!

Full manual control of heat and air, cooling tray and it can handle 1 LB
Upgrade to the SS Whirley pop for better results for another $30.  This is how I started out about 2 years ago and I gotta say even though I have a Behmor and a Sono I still miss this DIY Setup.

Stirring for 15min., not much fun.  Roasting multiple batches, more not much fun.   ;)
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 17, 2013, 10:39:18 AM
truth is 3/4 or half pound would do as well though keeping under 100 would be nice on the wallet
thanks for the replies
Title: Re: One Pound Roaster For under 100
Post by: John F on June 17, 2013, 10:58:58 AM
Over the years I've built a one pound roster in my mind that I'll eventually make. I think it will be $200

But for $100 and slightly under a pound sc/to is king.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 17, 2013, 11:17:17 AM
Under a $100 bucks impossible, I have built several of these for Family and friends, cost run around $130.00 that's not counting the shaft mods and spacer ring. I have tried those cheap $69.00 costco turbo ovens they won't last one of them I got 3 roast out of it and it gave up, had to take it back. I have found used GG for around $20.00 but that's rare. I have a spare GG like new condition that I gave $49.00 they are hard to find on the used market. I don't know of anything out there that compares to it. If you can find used maybe stay under $100.00? using good stuff.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 17, 2013, 11:47:11 AM
$55,   S-2000    http://www.sunpentown.com/paacforov.html (http://www.sunpentown.com/paacforov.html)

$25,   West Bend Stir Crazy

$5,     1.5" Aluminum strip from Lowes

$10,   15amp toggle switch, anywhere

$1,     Brass hanger bolt for super-cool shaft mod, Home Creepot

Total = $96

Add the thermometer for another $20 off ebay.

Done.


Edit: better yet, this turbo GG is on ebay, $61 shipped; http://preview.tinyurl.com/n99fjc9 (http://preview.tinyurl.com/n99fjc9)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 17, 2013, 01:29:59 PM
Peter that S2000 is selling for $99 bucks on the web site you linked to???, haven't seen a SC new for $25.00 maybe 39.00, I think I have seen them at Target for $19.00 around Xmas time. that's the best price I have found.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 17, 2013, 02:41:11 PM
Peter that S2000 is selling for $99 bucks on the web site you linked to???, haven't seen a SC new for $25.00 maybe 39.00, I think I have seen them at Target for $19.00 around Xmas time. that's the best price I have found.

Are you being argumentative?   ;)   Or, you just didn't look very hard...

That link takes you to their parts page, where the top for the S-2000 is $55.  But you're right, there's the shipping thing.  And I under-shot the SC price; Amazon has it for under $30 shipped, and Target has it for that price too.


truth is 3/4 or half pound would do as well though keeping under 100 would be nice on the wallet
thanks for the replies

Of course, under 100 would be nice on the wallet, and 80 would be better than 90.  But what if it's 110 or 120, does that make it a deal-breaker?
Title: Re: One Pound Roaster For under 100
Post by: Ascholten on June 17, 2013, 02:44:29 PM
Many years ago I did what I called a 'redneck roaster' from a george foreman grill, one of the bigger chicken roasting grills they have, a gallon clean paint can (clean as in new, not cleaned out from product, you can get at any hardware store) and some aluminum screen.

I forget what the forum was called where I posted the details at but i I remember it was right around 100 bucks, and yes it did work well, I even used it for roasting my cocoa beans too.

Aaron
Title: Re: One Pound Roaster For under 100
Post by: Mass. Wine Guy on June 17, 2013, 03:01:07 PM
Keep an eye on Craigslist. I've seen two Behmors. One was $150, the other was $75.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 17, 2013, 04:05:56 PM
100 isn't deal breaker but a cheaper 1/2 pound roaster is better. im thinking of going with the sc/to
Title: Re: One Pound Roaster For under 100
Post by: peter on June 17, 2013, 04:55:09 PM
If you have time and can wait for a deal on craigslist, or thrift stores, you'll spend way less than $100.  I see Stir Crazys all the time.  That TO on ebay I linked to, would be good too.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 17, 2013, 05:45:55 PM
That's kinda how I do it, built one for my brother for right around $40 bucks, these older GGs and Stir Crazys are built really well, I have had one for 4 years and it is going strong. Just roasted up two 12 oz loads of Brazil Bob-o-Link Peabodys this morning, very happy with the results. I have a 2Kilo Ozturk that I use couple times a week roasting about 30lbs a week for family and friends. I really like the SC/TO highly modified for sampling, the only thing I watch close is temps, not to let it go above 440 deg, the rest is time, color, smell, and dump at 2nd crack maybe a few sec into. I have found the older TOs are much better then the new stuff floating around. Never had a heating element go out on the GG but I have figured out a way to build my own if needed.
Title: Re: One Pound Roaster For under 100
Post by: Ascholten on June 17, 2013, 06:01:41 PM
What sea said, you can easily get the nichrome or whatever alloy wire they use for the elements and run your own.  If you know simple ohms law it is very easy to get it to put whatever wattage you want into your roaster.

Aaron
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 17, 2013, 07:04:23 PM
Heating elements do deteriorate over time, calculating for a new heating element is vary easy. I found some heating element material in China that would work, however I really would like to find some U.S made stuff. Never had one fail yet but you never know. Just for shits and grins I will make one anyhow and if mine never fails maybe somebody on GCBC might need one.
Title: Re: One Pound Roaster For under 100
Post by: Burner0000 on June 18, 2013, 05:04:50 AM
100 isn't deal breaker but a cheaper 1/2 pound roaster is better. im thinking of going with the sc/to


I almost bought one of these from a homeroaster building them to sell but I chose to go old school for learning purposes. :p
Check this out (http://koffeekosmo.com.au/)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 18, 2013, 08:15:14 AM
Some great ideas and info come out on this site, I to am building a roaster using a SS pot I have everything I need to assemble I just need to figure out a way to fab a stir arm and a drive shaft, I am using a 120 volt dc motor with speed control up to 100 RPMs thinking 40 to 50 RPMs will be about right. I have a Watlow temp controller with rs232 communication for data collection and storing profiles. Started on this last Winter, finding time to work on it sucks. The link that you posted is interesting.
Title: Re: One Pound Roaster For under 100
Post by: smico on June 18, 2013, 08:49:10 AM
Kosmo is very active on Homeroasters.org forum.
Great guy, always ready to help.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 18, 2013, 09:28:10 AM
Thanks for info, I seem to never get enough tech ideas
Title: Re: One Pound Roaster For under 100
Post by: Burner0000 on June 18, 2013, 10:50:46 AM
100 isn't deal breaker but a cheaper 1/2 pound roaster is better. im thinking of going with the sc/to

Friendly tip.  If you decide to take the sc/to route and you are able to loft 1 lb of coffee around in the roaster, look for a 1500W or higher turbo oven.  The heat generated will be enough for 1 lb.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 18, 2013, 12:23:56 PM
Yes I have 3 GGs 1500 watt TOs. Bought one the other day had to pay $49.00 for it but it was new, thought I better grab it, they are getting really hard to find. I am going to mod one with a 25 amp ssr and a real temp controller hoping to improve control with out having to deal with the 10 to 15 deg dead band. The units come with thyristers that work well if you don't need tight controls. Not been very happy with running a full pound, I find a sweet spot around 12 to 14 oz. 4 or 5 years ago Larry on this site turned me on to this method and it really works well for sampling and run small batches for my self.  Keeps me from needing to firing up the big guy for personal use.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 18, 2013, 02:22:51 PM
whered u find a new gg for 50 bucks?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 18, 2013, 02:30:33 PM
From a garage sale on my way home from hardware store, haven't seen one new for years. There is nothing out there that compares to them, I grab every one that comes available
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 18, 2013, 07:44:05 PM
if you have any extra new ones id be more than interested in buying one.
do you know of any other good brands?
Title: Re: One Pound Roaster For under 100
Post by: peter on June 18, 2013, 07:55:52 PM
if you have any extra new ones id be more than interested in buying one.
do you know of any other good brands?

I'd suggest not getting hung up on 'new'.  They last a long time, and most likely you'll find a used one with very little use.  There are new ones on ebay, but they're twice the money, and you won't get twice the life out of it.

But even if you paid $90 for a new one, and another $50 putting the whole contraption together.  Say it lasts you six years...  mine have roasted thousands of lbs. so you should be able to get at least six years out of one...  six years of roasting for $140, or $25 a year.  If you complain about that, we'll see that your membership is revoked.   ;)   ;D
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 18, 2013, 07:58:40 PM
I have a couple 1200 watt ones that work very good, I prefer GGs, I wouldn't worry about buying used.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 18, 2013, 08:03:44 PM
I have a couple 1200 watt ones that work very good, I prefer GGs, I wouldn't worry about buying used.

I see the issue of the wattage of TO's come up from time to time.  While it would make sense to buy the highest wattage you can, I've never seen a difference in roasts or their duration or their output based on 1200 vs. 1440.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 19, 2013, 07:51:31 AM
Does anyone have experience with this model
http://www.amazon.com/Convection-Countertop-complete-Accessories-including/dp/B0096PZ942/ref=pd_sim_sbs_k_3 (http://www.amazon.com/Convection-Countertop-complete-Accessories-including/dp/B0096PZ942/ref=pd_sim_sbs_k_3)
?
Title: Re: One Pound Roaster For under 100
Post by: peter on June 19, 2013, 09:13:33 AM
I don't.  The units that heat w/ a halogen bulb are always cheaper.  I just wish there was a definitive answer on if they work as well as the old standard.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 19, 2013, 01:53:35 PM
Nothing works as well as the older conventional  type TO ovens, they just don't build them well anymore. halogen bulbs won't hold up, they deteriorate kinda fast, and a little expensive to replace. The under $100 bucks TOs for what we use them for will take em out over a short time. I have looked at the heating elements on the newer stuff very cheap compared to the heavy duty older ones. I guess keep the price up and cut quality with light duty parts is the model for profit. Don't wast your money on most of the new stuff out there wont cut it for the demands that we use them for
Title: Re: One Pound Roaster For under 100
Post by: peter on June 19, 2013, 02:41:25 PM
Nothing works as well as the older conventional  type TO ovens, they just don't build them well anymore. halogen bulbs won't hold up, they deteriorate kinda fast, and a little expensive to replace. The under $100 bucks TOs for what we use them for will take em out over a short time. I have looked at the heating elements on the newer stuff very cheap compared to the heavy duty older ones. I guess keep the price up and cut quality with light duty parts is the model for profit. Don't wast your money on most of the new stuff out there wont cut it for the demands that we use them for

The new Sunpentowns might be the exception.  They hold up well.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 19, 2013, 10:23:34 PM
if you have any extra new ones id be more than interested in buying one.
do you know of any other good brands?


Decosonic made a TO that appears to be a re-branded GG, which I've used and loved.  I just scored this one off ebay; http://preview.tinyurl.com/k7oa2je (http://preview.tinyurl.com/k7oa2je)
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 20, 2013, 08:07:59 AM
is this model is good
http://www.amazon.com/Sunpentown-SO-2000-Multi-Function-Round-Shaped-Convection/dp/B0001NYJP8/ref=sr_1_12?ie=UTF8&qid=1371740803&sr=8-12&keywords=sunpentown (http://www.amazon.com/Sunpentown-SO-2000-Multi-Function-Round-Shaped-Convection/dp/B0001NYJP8/ref=sr_1_12?ie=UTF8&qid=1371740803&sr=8-12&keywords=sunpentown)

?
Title: Re: One Pound Roaster For under 100
Post by: peter on June 20, 2013, 08:28:07 AM
is this model is good
[url]http://www.amazon.com/Sunpentown-SO-2000-Multi-Function-Round-Shaped-Convection/dp/B0001NYJP8/ref=sr_1_12?ie=UTF8&qid=1371740803&sr=8-12&keywords=sunpentown[/url] ([url]http://www.amazon.com/Sunpentown-SO-2000-Multi-Function-Round-Shaped-Convection/dp/B0001NYJP8/ref=sr_1_12?ie=UTF8&qid=1371740803&sr=8-12&keywords=sunpentown[/url])

?


That's great, if you want the glass bowl, racks, etc.  The link in my post above to Sunpentown parts has the same unit, but just the top, for #55 plus shipping.

If it were me, I'd spend the money on one of the clean/lightly used Galloping Gourmets or Decosonics on ebay.  I think they're built better.  But if there were nothing on ebay and you can't wait for a thrift store/garage sale find, there's nothing wrong w/ the S-2000.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 20, 2013, 09:40:39 AM
Peter, they hit ya good on shipping, Just the top shouldn't have been more then $12.50 and that's giving them a couple of bucks for handling.. What is the wattage on it.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 20, 2013, 10:10:38 AM
Peter, they hit ya good on shipping, Just the top shouldn't have been more then $12.50 and that's giving them a couple of bucks for handling.. What is the wattage on it.

Either way, they'll hit you for shipping, whether it's just the top or the whole unit, and if you don't need the big glass bowl, you'll end up w/ 2 or 3 laying around like me.   :-[     I don't know the wattage off hand, but it roasts the same as the GG or Decosonic.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 20, 2013, 10:50:05 AM
Understand I have some bowls laying around. My Wife made me build a solar cooker out of one of them, works great. First time for her thinking outside the box, bravo to here. If you get into a bind and need a T/O let me know, I will throw you one. I may have 4 or 5 laying around.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 20, 2013, 01:23:32 PM
how bout the nuwave infrared ovens?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 20, 2013, 01:56:56 PM
Don't know much about the infrared ovens other then what I have heard, know of one guy did not like it if I remember temp issues and prone to failure. I would stay with the GGs they seem to hold up to coffee roasting application. I think when you refer to infrared you mean quarts heating method correct. One thing about the conventional heating elements they can be replaced, lots of fan motors out China that can be had to retro fit. I snag every one I run across in case I need parts or somebody on this site needs something. Good luck
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 21, 2013, 05:08:02 PM
It looks like the stir crazy has some sort of non-stick coating, any concern about it flaking off?  Are the temps keep low enough you dont have to worry about off-gassing?   
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 21, 2013, 05:29:35 PM
I removed the teflon from mine just to be safe, a little hassle but worth it.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 23, 2013, 04:37:32 PM
Bought the replacement top came out to 68 with shipping still cheaper than amazon
Title: Re: One Pound Roaster For under 100
Post by: peter on June 23, 2013, 04:42:15 PM
Bought the replacement top came out to 68 with shipping still cheaper than amazon

So that was you bidding against me...            ;D
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 23, 2013, 05:21:08 PM
Not me my friend, I have never bid on a oven off ebay, I am kinda lucky, Family and friends look out for me, and when they find one they snag it for me, small price I guess for them to keep fresh roaster coffee going there way. I think I am truly blessed, things comes back to me 10 fold. Good luck and if you need anything regarding parts for this kinda roasting let me know.

Rich
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 23, 2013, 05:48:02 PM
Just mounted a 50 rpm motor on a SC base unit, what a pain getting it lined up and mounted took a pic hope it downloaded
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 23, 2013, 05:50:59 PM
Pic of the pan with Teflon removed
Title: Re: One Pound Roaster For under 100
Post by: mp on June 24, 2013, 12:42:42 PM
Hey Sea ... where did you get your motor from?

Does that say 240 watts on it? Where do you live?

Nice job on the teflon!

 :)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 24, 2013, 01:15:26 PM
Found it on ebay it's 14 watts and it really has allot of torq, Test run it yesterday runs sweet. Found one of them little wall plug transformer rated at 100 watts for $10.00 bucks and the motor cost $20.00. This solved all my issues with slow RPMs and it mounted fairly easy after I figured it out. Took 4 each 1/2 stand offs that found at Lowes and 4 each 8-32 screws. Let me know if I can be of any help. Rich
Title: Re: One Pound Roaster For under 100
Post by: mp on June 24, 2013, 01:46:46 PM
Thanks Rich.

How come 240 volts?

 :o
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 24, 2013, 02:43:19 PM
I looked at 120 volt 50 rpms they were running from $85 to $185, the 220 14 watt  motors are cheap and the Europe conversion voltage transformer worked perfect, they are small and good for 100 watts, higher voltage better torq, I will solder the motor on to the original power supply connection point and use the original cord. Right now I have every thing tempt for testing. The motor has a 7MM shaft, easy to make a coupling and set screw to secure the motor. better then them dam hex drive on original drive motor. I have went threw several motors trying to find the right motor that would work with enough torq to run smothly. I am sure this is the fix for all of our drive motor issues. Rich
Title: Re: One Pound Roaster For under 100
Post by: mp on June 24, 2013, 02:48:42 PM
I see.

How much did the Europe conversion voltage transformer run you?

 ???
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 24, 2013, 06:12:34 PM
The transformer ran $10.00 off ebay, 110 to 220 volts ac. that should be fine to cover inductive kick for a 14 watt motor.
Title: Re: One Pound Roaster For under 100
Post by: smico on June 24, 2013, 08:00:29 PM
With all those modifications, Kosmo's design is probably worth checking out.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 24, 2013, 08:21:22 PM
has anyone ever tried using this as a roaster?
http://www.amazon.com/Presto-03430-Pizzazz-Pizza-Oven/dp/B00005IBXJ/ref=pd_rhf_dp_s_cp_9 (http://www.amazon.com/Presto-03430-Pizzazz-Pizza-Oven/dp/B00005IBXJ/ref=pd_rhf_dp_s_cp_9)
looks like with some modifications it could work
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 25, 2013, 06:45:44 AM
I to have been Building a roaster on the basic Kosmo's design for the last 8 months hope to get back on it soon . The last 3 months I have been remodeling my shop. Insulation, drywall, rewire, the only thing left to do is the base boards, and painting the floor. Been a pain moving my 2 Kilo roaster in and out to roast. I don't roast commercially just for family and friends around a 100 lbs a month. should get my money back for the 2 Kilo roaster in another 6 months
Title: Re: One Pound Roaster For under 100
Post by: mp on June 25, 2013, 10:19:21 AM
has anyone ever tried using this as a roaster?
[url]http://www.amazon.com/Presto-03430-Pizzazz-Pizza-Oven/dp/B00005IBXJ/ref=pd_rhf_dp_s_cp_9[/url] ([url]http://www.amazon.com/Presto-03430-Pizzazz-Pizza-Oven/dp/B00005IBXJ/ref=pd_rhf_dp_s_cp_9[/url])
looks like with some modifications it could work


It's certainly cheap enough. If you purchase it let us know how it works.

 :)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 25, 2013, 10:46:03 AM
Test run things for about and hour so far works perfect, hooking up the bottom heating element with a dimmer to manage temps. I will report back after I run my first load. As robust the motor runs the stirring arm really spins fast 50 RPMs might be to fast, I may need to install some speed control to find the sweet spot on rotation speed. They sell these motors at 20- 30- 40 and 50 RPMs. they also have them slower then 20 RPMs but who would want to go any slower, The 100 watt transformers are the bomb, they pair with the motor very well. I paid $9.50 plus a buck shipping. Received from China a little over a week shipping time
Title: Re: One Pound Roaster For under 100
Post by: mp on June 25, 2013, 12:52:35 PM
Would you mind supplying a link for your motor?

Thanks.

 :)
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 25, 2013, 07:26:35 PM
Pic of the pan with Teflon removed
The surface looks pretty smooth, how do you get the Teflon off?
Title: Re: One Pound Roaster For under 100
Post by: rasqual on June 25, 2013, 10:48:35 PM
100 isn't deal breaker but a cheaper 1/2 pound roaster is better. im thinking of going with the sc/to

I roast 10 oz (green weight) in a Wearever Popcorn Pumper (the 1400w version). Variac. There are less expensive alternatives to boost the fan, which would bring a half pound roaster under $50. Oh, and buy a pair of Corning "Duo" bread tubes on e-bay. Cheap.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 26, 2013, 05:37:37 AM
Teflon removal can be very easy if you get the right sand blasting media I used the glass cutting blasting material ordered from a outfit in Tacoma Wa,  If you interested I will try to find the paper work on it and get you a number. If your teflon pan on your roaster starts getting black and flaking off I would get it removed asap. I have about 45 lbs of this stuff left after doing 3 or 4 for my self and friends that I built roasters for.

Rich
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 26, 2013, 08:01:05 PM
Teflon removal can be very easy if you get the right sand blasting media I used the glass cutting blasting material ordered from a outfit in Tacoma Wa,  If you interested I will try to find the paper work on it and get you a number. If your teflon pan on your roaster starts getting black and flaking off I would get it removed asap. I have about 45 lbs of this stuff left after doing 3 or 4 for my self and friends that I built roasters for.

Rich
Thanks Rich.  I dont have a sandblaster and not sure I would buy one for one roaster, but I guess I could get a auto body or machine shop to do one.   
Title: Re: One Pound Roaster For under 100
Post by: kaotep on June 27, 2013, 08:57:54 AM
will a #60 sandpaper cut it for removing the teflon coating? going to #120 after most of it is gone?
Title: Re: One Pound Roaster For under 100
Post by: peter on June 27, 2013, 09:04:44 AM
I'm wondering if a propane torch would work to just burn it off; sounds easier than scraping and more fun too.

That said, I never bothered w/ mine, and don't think it's a hazard.
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 27, 2013, 10:32:04 AM
I'm wondering if a propane torch would work to just burn it off; sounds easier than scraping and more fun too.

That said, I never bothered w/ mine, and don't think it's a hazard.
The torch should work, but if you believe the stuff about toxic fumes if you over heat teflon it seems to defeat the purpose of removing it.

You are probable right that it is nothing to worry about.  I do know first hand there is a stink that comes off teflon pans if they are over heated,  not sure how hazardous it is, just not sure I want find out either.       

There is information on the internet about removing teflon that says use lye or oven cleaner then steel wool it off.    As easy as the stuff scratches off, a little elbow grease and steel wool should work by itself. 





Title: Re: One Pound Roaster For under 100
Post by: peter on June 27, 2013, 10:48:00 AM
I just use a silver high-heat paint designed for exhaust manifolds, and when the crud from roasting accumulates I give it a fresh coat to keep it looking new.  It must have about 15 coats on it by now. 

 ;)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 28, 2013, 08:42:08 AM
With all the blasting media I have left over I would be happy to send one with the teflon removed to anybody that needs one for $20.00 shipping included. I should have enough to do about 15 more, maybe a way for me to get rid of my left over stuff, Just personal email me if I can help.

Rich
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 28, 2013, 03:08:42 PM
We are huge on healthy cooking, I have read allot on Teflon and in my opinion it is very toxic over  time when it starts flaking off and burnt,  using chemicals to remove it???, seems to me the chemicals can get into the porosity of the metal and cause health hazards. I have never heard of any coffee roaster manufacture using Teflon coated devices to roast coffee. None of my hobby roasters have any Teflon on it. I do know even Aluminum at temps over 700 deg can be unhealthy. It is fun building these things on the cheap but we need to be aware of health issues.

Rich
Title: Re: One Pound Roaster For under 100
Post by: peter on June 28, 2013, 03:40:15 PM
I'm conscious too, of healthy eating/living, and not ingesting toxins.  I just don't think the temps in a SC/TO get high enough that the teflon is an issue, and don't think there's a mechanism for any toxicity to migrate into the beans and then back out of the beans during brewing.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 28, 2013, 04:08:10 PM
Hope your right, I think the pan can get very hot next to the heating elements, What effect it could have on the teflon???. Maybe when the pan starts looking ugly and looks like the teflon is flaking off it is time to change it out or remove the coating. It is very cheap to purchase a siphon sand blaster about $20 bucks off ebay and and go to Ace hardware and get a bag of fine Silica sand and be careful not to blow threw, the glass blasting media is the best.

Rich
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 28, 2013, 09:31:08 PM
Hope your right, I think the pan can get very hot next to the heating elements, What effect it could have on the teflon???. Maybe when the pan starts looking ugly and looks like the teflon is flaking off it is time to change it out or remove the coating. It is very cheap to purchase a siphon sand blaster about $20 bucks off ebay and and go to Ace hardware and get a bag of fine Silica sand and be careful not to blow threw, the glass blasting media is the best.

Rich


here is some information regarding the temp range of Teflon.  Looks like under 500 is not a problem, over 660 is not good.   In normal roasting situation that is most likely OK.
http://www2.dupont.com/Teflon/en_US/products/safety/cookware_safety.html (http://www2.dupont.com/Teflon/en_US/products/safety/cookware_safety.html)
 
Be careful with the silica sand. 
http://www.osha.gov/dsg/etools/silica/protect_against/stopsandblasters/stopsandblasters.html (http://www.osha.gov/dsg/etools/silica/protect_against/stopsandblasters/stopsandblasters.html)


Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 29, 2013, 05:46:18 AM
Most of this stuff is made in China, do we trust them to apply Teflon correctly???. They are known to cut cost or find ways to cheapen the process! just speculation. Please air on the side of caution. I think we got a little off topic on this thread but building a roaster under $100.00 on the cheap may have a down side. I think the SS pot method is the best system, the only thing is you need allot of shop tools to build. I think I have spent over $1000.00 just to support my roasting hobby, good investment, affords me hours of tinkering in the shop. The electrical/electronics part is a piece of cake, the fabrication part is tough to get it right.

Rich
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on June 29, 2013, 06:51:13 PM
whats the ss pot method?
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on June 29, 2013, 07:51:01 PM
whats the ss pot method?
A Koffee Kosmo type approach using a stainless steel pot(s) and a Turbo Oven. 

Not as simple a solution as the stir crazy as you need to create your drive and no easy second heat source.  Still in  the $100 neighborhood.
Title: Re: One Pound Roaster For under 100
Post by: peter on June 29, 2013, 08:45:59 PM
You don't really need the bottom heat.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 30, 2013, 06:16:26 AM
I installed a heating element from a SC on the bottom of the SS pan with a 3000 watt dimmer and set temp limit at 400 deg and control the roast with the Turbo oven. I never roast over 440 deg, I will need to play with temp settings to get it right. I am using a inexpensive temp controller that I purchased off ebay for the bottom element. I plane to use two TC, one for the bottom and one for the top and using SSRs to control. I am about 3/4 of the way threw the project. I am hoping to stay under $100 bucks in parts. Fabrication has very little cost just allot of time.

Rich
Title: Re: One Pound Roaster For under 100
Post by: peter on June 30, 2013, 07:00:01 AM
Does that mean the two thermostats will always be doing what you want?  I found it frustrating that when I was trying to maintain a set temp, the bottom t-stat would come on and/or when I wanted to ramp up the heat it would turn off.  I found it simpler to just deal w/ one heating element.  But your controls may be different.  If you're using a temp controller for the bottom element, why even have a t-stat on it?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on June 30, 2013, 08:53:00 AM
I don't know whats going on with my PC but when I hit the back space I loose all my text, I will try it again. I am using a K type TC to find the sweet spot for temp on the bottom element, I am thinking 400 deg to start. The T stats that come with the SCs has way to much dead band to be useful, it can swing 20 deg or more. Once I find a good setting for the bottom element I will leave it fixed at set point. I will add another TC for the turbo oven. There will be two rigid K type TCs mounted on the SS pan in the bean mass, mounted center of the pan. I am using a DC drive motor with rpm running 0 to 80 rpms. I guess I should drag the project out and take a Picture of it to give you a better Idea, The last 3 months have been very busy around here remodeling my shop, finally done with insulation, drywall, and texture,painting. The only thing left is the base boards. Spent most of last night installing ac unit. Can;t wait to get back to my hobby projects.

Rich
Title: Re: One Pound Roaster For under 100
Post by: donn on July 01, 2013, 11:26:04 PM
whats the ss pot method?

Not that it was what was meant by that, but ... have dog bowl/heat gun people ever managed a one pound roast (I forget if we're talking about one pound in, or one pound out?)  That always struck me as the rock bottom, since the bowl and heat gun both have other useful applications.
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on July 02, 2013, 08:44:27 AM
whats the ss pot method?

Not that it was what was meant by that, but ... have dog bowl/heat gun people ever managed a one pound roast (I forget if we're talking about one pound in, or one pound out?)  That always struck me as the rock bottom, since the bowl and heat gun both have other useful applications.
I use a heat gun with a cast iron pot on a camp stove and can do a 1lb of green coffee.  My pot is a 2.5qt size, I can do from 1/4 to 1lb,  1/2 to 2/3 is best, above 3/4 it is work to keep the beans mixed,  a larger pot would be better for a pound or more.      I think the simple HG/DB approach could do a 1 lb but the time may be sort of long.   

Iron pot $30, whisk $10, Heat Gun $15, stove $40.  I had the stove and heat gun already so it was $30 to get started(whisk added later).    Hands on roasting, no multi-tasking, with some practice consistent roasts and results.   Agitator  tends to drags toward the end of long sessions and requires a thorough cleaning.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 03, 2013, 04:50:00 AM
Hi
does anyone have some basic roast profiles for the stir crazy/ turbo oven?
Title: Re: One Pound Roaster For under 100
Post by: peter on July 03, 2013, 07:32:25 AM
Hi
does anyone have some basic roast profiles for the stir crazy/ turbo oven?

Are you, and if so how, measuring bean temps?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 03, 2013, 09:38:53 AM
I usually preheat to 300 deg, dump in beans, when bean temp gets to 300 deg, run for 3 min then bump up set point to 440 deg and let it go, you can get fairly good roast in about 15 min or less. This is fairly basic but a good start. Another is to preheat to 350 deg dump in beans when BT gets to 350 deg run for 4 min then bump up set point to 450 deg for a little darker roast. I always dump beans at first sign of second crack.. Hope this is helpful
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 03, 2013, 10:08:50 AM
i am not measuring bean temp, should i take out the heat source of the stir crazy?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 03, 2013, 12:55:37 PM
I left mine in, I just wired a sw to turn off when things get rolling. You should get a temp probe, they are cheap on ebay. There is a thread for SC/TOs on this site, it explains things very clearly. High quality greens are to expensive to screw it up
Title: Re: One Pound Roaster For under 100
Post by: peter on July 03, 2013, 02:34:49 PM
What Rich said.

Put a switch inline between the input and the t-stat on the Stir Crazy.  And w/o a thermometer in the bean mass, there's almost no point is talking about profiles.

That said, you can roast by color and time.  By that I mean, watch for when the beans lose just a little bit of their green-ness, and let them coast at that temp for a couple minutes - that's the drying phase.  Once they're gone from green to light yellow/gold, turn the heat up and just let it go.  The power on the TO is such that w/ 12oz. of beans you'll have a nice gentle ramp to 1C, and you don't really need a profile in between.

But get a digital thermometer on ebay anyway, just 'cuz we said so.   ;)
Title: Re: One Pound Roaster For under 100
Post by: Ascholten on July 03, 2013, 02:50:48 PM
If you have birds, teflon fumes will kill them.  Probably not too good for people either.  I don't think it will get that hot if designed correctly.

No of course coffee roasters don't have teflon!!  Why?  There is no need for it, beans are not going to stick to the roasters.  Not to mention the rocks and stuff that find their ways into roasters would probably do all kinds of terrible stuff to the teflon as well.

Lye might eat your base metal as well.  It will eat the hell out of aluminum, so if it's a T coated aluminum pan, lye is a bad move, well, so is acid to be honest.  If you want something a bit gentler,but would take a bit longer, try the stuff you clean your coffee pots with, let it soak on them a bit after scratching em up with a brillo pad.

or you could just polyurethane your stuff and not have to worry about the teflon coming off  ;D 8)

Aaron
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 03, 2013, 03:27:49 PM
Lucky for us we have nothing in our house that is Teflon coated to cook on, and for a year now my little SC/TO hobby roasters has no Teflon on it. Using the glass cutting blasting media peals it off in 4 or 5 min. then I use a SOS scrubbing pad to clean and polish, works perfect. The lazy way to do it. Rich
Title: Re: One Pound Roaster For under 100
Post by: peter on July 03, 2013, 08:21:35 PM
Just scored a decent Decosonic TO off ebay... $25 shipped.  Not quite as good as the deal last week... $45 shipped.

Something do is, during the bidding I'll ask the seller if they'll reduce their shipping costs since I don't need another big glass bowl.
Title: Re: One Pound Roaster For under 100
Post by: mp on July 03, 2013, 09:20:19 PM
Just scored a decent Decosonic TO off ebay... $25 shipped.  Not quite as good as the deal last week... $45 shipped.

Something do is, during the bidding I'll ask the seller if they'll reduce their shipping costs since I don't need another big glass bowl.

Do they normally accommodate that request?

 ???
Title: Re: One Pound Roaster For under 100
Post by: peter on July 03, 2013, 09:33:23 PM
Just scored a decent Decosonic TO off ebay... $25 shipped.  Not quite as good as the deal last week... $45 shipped.

Something do is, during the bidding I'll ask the seller if they'll reduce their shipping costs since I don't need another big glass bowl.

Do they normally accommodate that request?

 ???

The last two did.  They know they can list the bowl separately, so if they knock $5 off my shipping and have a bowl that might bring $15...   Then I threaten to send Mikey down to lean on them a little...  they always see it my way eventually.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 03, 2013, 09:44:35 PM
Great deal $25.00 shipped.  After shipping cost and fees the guy made about 2 bucks on the deal, wait after his time packaging labeling he lost $2.00. Great deal P
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 06, 2013, 11:37:53 PM
I started roasting beans just a few months ago, with an inexpensive heat gun and a stainless steel bowl, and had what I believed were OK results with up to 2 cups (350gm) of green beans.  Once I saw SC/TO's in action on youtube, I just had to build one.

I'm not knowledgeable enough about roasting to speak to the "good" component of the triple constraints (good/fast/cheap), but the SC/TO was definitely cheap and fast.

$10 - used Stir Crazy
$38 - new Rosewill TO (could not find one at the local thrift stores)
$7 - 1.5" x 1/16 thick aluminum
$3 - 1" copper plumbing cap
$58 total

As for "fast", it was 5 days from the time I first stumbled across a SC/TO video until the time I finished my first test roast on one. The most time consuming part was driving around to the local thrift shops and the most challenging was getting that danged aluminum spacer shaped into a decent circle.  I've since done about 7 more roasts, if the attachment works, below should be a pic of today's roasting results with 325gm of Burundi Kirimiro Teka.

Title: Re: One Pound Roaster For under 100
Post by: mp on July 07, 2013, 04:41:46 AM
Just scored a decent Decosonic TO off ebay... $25 shipped.  Not quite as good as the deal last week... $45 shipped.

Something do is, during the bidding I'll ask the seller if they'll reduce their shipping costs since I don't need another big glass bowl.

Do they normally accommodate that request?

 ???

The last two did.  They know they can list the bowl separately, so if they knock $5 off my shipping and have a bowl that might bring $15...   Then I threaten to send Mikey down to lean on them a little...  they always see it my way eventually.

You mean you used Mikey's name in vain?

 :o
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 08, 2013, 08:58:01 PM
is it necessary to remove the heat element from the sc for roadt profiling?
Title: Re: One Pound Roaster For under 100
Post by: peter on July 08, 2013, 09:06:47 PM
is it necessary to remove the heat element from the sc for roadt profiling?


http://www.greencoffeebuyingclub.com/index.php?topic=16227.msg263073#msg263073 (http://www.greencoffeebuyingclub.com/index.php?topic=16227.msg263073#msg263073)
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on July 09, 2013, 09:04:17 AM
Not sure if this was mentioned but a bread machine/heat gun setup should come in under $100 if you get the bread machine used.   I watched a video that they roasted about 5 cups of green  beans, which is about 1.5lb.   

Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 09, 2013, 10:13:40 AM
Almost completed my SC/TO project speed control on the 50 rpm motor, 3000 Watt dimmer on the lower element, installed a TC for bean temp just need to test and repackage. My Brother is cumming up next weekend to weld a 1" Aluminum tubing for chafe ejection and maybe try to fab a little damper

$21.00 motor
$13.00 dimmer
$7.00 SC Goodwill
$25.00 Turbo Oven
$22.00 Motor speed controller
$11.00 TC
$20.00 basic temp controller, no pid. This is a spare I had laying around. (Pushed the total little over $100.00 bucks)
Title: Re: One Pound Roaster For under 100
Post by: mp on July 09, 2013, 03:08:47 PM
Well done Sea.

How many pounds is the maximum for that motor?

 :)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 09, 2013, 05:38:07 PM
It has allot of torq, I would bet it would handle 3 lbs easy, but the most you could put in this set up 1.5 to 2 lbs. Playing around with it this morning adjusting the dimmer on the heating element to 320 watts seems to heat up to right at 350 deg, next step is to clean up the tangled mess, get things organized for easy dumping. I will probably give this one to my Brother, this stuff is fun to play with. I have two others I don't need another. If it works well maybe a tiny road map for somebody on GCBC. I thought of the pid approach but decided just good temp control with a couple deg dead band from set point would work the best for this application.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 10, 2013, 08:32:45 AM
where is a good place to get a thermometer?
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 10, 2013, 09:01:06 AM
Keep your eyes open on ebay, you can find some good ones. Omega, or even from China, good enough for what we do.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 10, 2013, 03:34:18 PM
cant wait for the shipping need it quick
want to start profiling
Title: Re: One Pound Roaster For under 100
Post by: peter on July 10, 2013, 03:51:21 PM
But get a digital thermometer on ebay anyway, just 'cuz we said so.   ;)

Shoulda listened...  you'da had it by now.   ;D


I've seen similar models in stores w/ good kitchen departments, but be careful because most of them nowadays only go up to 392F.
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 10, 2013, 06:32:06 PM
you guys are a tough audience  :'(

http://www.ebay.com/itm/6802II-2-Channel-Two-Type-Digital-Thermometer-Thermocouples-Sensor-/190823818292?pt=LH_DefaultDomain_0&hash=item2c6dfc6434 (http://www.ebay.com/itm/6802II-2-Channel-Two-Type-Digital-Thermometer-Thermocouples-Sensor-/190823818292?pt=LH_DefaultDomain_0&hash=item2c6dfc6434)

I just got one of these on Monday... came with 2 thermocouples rated to 400C and a 9v battery for $19 shipped from New Jersey.  Took 4 biz days to arrive here in So Cal.  I've noticed a few of these in use by home roasters, as I've slowly been wading thru posts on sc/to roasters. 
Title: Re: One Pound Roaster For under 100
Post by: mp on July 10, 2013, 07:44:21 PM
you guys are a tough audience  :'(

[url]http://www.ebay.com/itm/6802II-2-Channel-Two-Type-Digital-Thermometer-Thermocouples-Sensor-/190823818292?pt=LH_DefaultDomain_0&hash=item2c6dfc6434[/url] ([url]http://www.ebay.com/itm/6802II-2-Channel-Two-Type-Digital-Thermometer-Thermocouples-Sensor-/190823818292?pt=LH_DefaultDomain_0&hash=item2c6dfc6434[/url])

I just got one of these on Monday... came with 2 thermocouples rated to 400C and a 9v battery for $19 shipped from New Jersey.  Took 4 biz days to arrive here in So Cal.  I've noticed a few of these in use by home roasters, as I've slowly been wading thru posts on sc/to roasters.


Yeah ... I got one of these too.

Good thermometer.

 :)
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 10, 2013, 08:42:47 PM
These are fairly good temp meters the only thing I would do is find good K type TC at least 20 gauge, the ones that come with are kinda flimsy, I bet there 28 or 30 gauge. The TC mini connectors are easy to get and they are cheap. You can make your own thermocouples, just purchase some good K type thermocouple wire and weld the tip, works great. I see 20 gauge TC wire on ebay all the time
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 13, 2013, 03:11:30 PM
I finally got to try a test roast with the dual thermocouples today.  Until now, I've been roasting my sound, sight and smell.
At the same time, this was also a test of a new stir arm, plagiarized from Peter's design and a test roast with just 1 cup of Kona beans that I wanted to take to city+.  The first time I roasted these beans, I only took them to barely past 1c and they were a bit sour.

I enjoy roasting and hope having both environment temp and bean temp will help me better reproduce results, once I somewhat figure out what the heck I am doing :o

Ambient temp was 80f and I set the T1 thermocouple low under the spacer ring so it would be in the bean mass, with the T2 over the ring so it would read ET about mid point from the SC plate and the top of the TO glass.
Started with 1 cup of green beans @ 175gm -- roasted weight was 145gm and about 1 3/4 cups -- the just roasted beans smell slightly sweet (brown sugar?) in a glass jar.

Preheated the TO to 300 and when ET thermocouple said 300, dropped beans in and turned TO to 350
At ~4minutes beans were just starting to turn tan, turned TO to 400 
@ ~8 minutes beans were tan, turned TO to 437, BT was increasing past 350
First pop of 1c started at ~12mins, BT was 395-400 and ET was 470 - turned TO down to 415
1c was going strong until ~15 minutes, BT was ~406-410 and ET 462
At 19 minutes I heard first snap of 2c - BT was 426 and ET 462
Pulled beans and immediately cooled                     
By sight and sound (barely 2c) I'd think beans were city+ to full, but bean temp was only 426, wouldn't that be more of a city than city+???  I'd appreciate any advice - finally finished the 37 pages of posts in the SC/TO profiles thread (took several evenings of perusing).  Some stuff I read there is the reason I took the beans more slowly thru drying and tried to keep them at ~350f for 3-4 minutes.

Below should be pics of the roasted beans, the TC placement (1 under the spacer ring and 1 over), and my leaf blower-colander bean cooler that sucks air down thru the beans and cools them to touch in ~15 seconds

Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 13, 2013, 04:21:00 PM
Bravo, fine job. Roasting is a never ending journey, so many variables to get it right. I don't let my beans get over 440 deg, it will swing 438 to 445. Fancy looking stir arm, was that Peters idea. I don't like the TCs that come with the meters they have that rubber looking stuff on the end. I would recommend finding some good ones at least 20 gauge, a little stiffer so they would stay in position. You will learn more than most methods of roasting using the SC/TO system. I don't know who thought this up originally but to me it is pure innovation
Title: Re: One Pound Roaster For under 100
Post by: peter on July 13, 2013, 04:27:55 PM
First pop of 1c started at ~12mins, BT was 395-400 and ET was 470 - turned TO down to 415
1c was going strong until ~15 minutes, BT was ~406-410 and ET 462
At 19 minutes I heard first snap of 2c - BT was 426 and ET 462
Pulled beans and immediately cooled                     
By sight and sound (barely 2c) I'd think beans were city+ to full, but bean temp was only 426, wouldn't that be more of a city than city+??? 

Nice job on the stirring arm.  Not easy, is it?

Even tho' your temps seem fairly typical, remember that your numbers are your numbers and they may not directly translate to what others see.

That said, if you heard some outliers of 2C, then 426 for you is a FC or FC+.  Another marker to watch for, if you want to stop just short of that is the noticeable increase in smoke just before 2C starts.

I'd also say that if your 1C is beginning at 395, a 30-degree jump to 425 is much more than a City or C+.  My guess is it might take a 20 degree increase to clear 1C, so a City would be somewhere around 415 on your rig.  If you're aiming for C or C+, look for wrinkles on the bean surface.
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 13, 2013, 05:03:17 PM
Thanks for the feedback.
Making that stirring arm, like forming a flat aluminum strip into a nice round spacer ring, was deceptively difficult... I think I spent about an hour to get the wire in the basic shape, and then another 20 minutes or so to fine tune it on the SC.  Can't wait to try it again with a full batch of about 350gm of beans.  But in it's debut, I like the way it pushes the beans in from the edge.

I didn't even think about the temp differential from first pop of 1c to when I should pull the beans... thanks for that tip, it will be a big help with my future roasts.   Not sure what you mean by "wrinkles"... will go check out the SM beans photo page now to see if I can figure that out.

As machines go, I love this SC/TO roasting.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 15, 2013, 09:19:00 AM
got my thermometer,
should i remove the heating element from the sc?
also how should i profile the no name o from sweet marias/
thanks everybody
Title: Re: One Pound Roaster For under 100
Post by: MMW on July 15, 2013, 09:20:14 AM
([url]http://www.greencoffeebuyingclub.com/index.php?action=dlattach;topic=16227.0;attach=14910[/url])


I just love this ;D
Title: Re: One Pound Roaster For under 100
Post by: sea330 on July 15, 2013, 10:11:15 AM
I left the Heating element in and installed a dimmer in series to turn the heat down, if you go this way, leave the thermester in the circuit just to be safe. I use a watt meter just as a ref point, I find 320 watt load seems to work fairly good, however I am still experimenting to find that sweet spot.. The beans at the outer rim of the pan seems to run hotter, need to mod the stir arm to throw them back to the middle, other then that you are on the road for some great roasts.
Title: Re: One Pound Roaster For under 100
Post by: peter on July 15, 2013, 11:00:39 AM
should i remove the heating element from the sc?

That's like the third time you've asked that question, with replies every time.  Do you not read the replies that are given to you, or what?   ::)
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 15, 2013, 12:59:56 PM
good point ;)
no just wanna be sure
Title: Re: One Pound Roaster For under 100
Post by: peter on July 15, 2013, 02:32:23 PM
good point ;)
no just wanna be sure

Sounds like you're on the right track, and zeroing in on your target.
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on July 17, 2013, 02:24:02 PM
Thanks for the feedback.
Making that stirring arm, like forming a flat aluminum strip into a nice round spacer ring, was deceptively difficult... I think I spent about an hour to get the wire in the basic shape, and then another 20 minutes or so to fine tune it on the SC.  Can't wait to try it again with a full batch of about 350gm of beans.  But in it's debut, I like the way it pushes the beans in from the edge.

I didn't even think about the temp differential from first pop of 1c to when I should pull the beans... thanks for that tip, it will be a big help with my future roasts.   Not sure what you mean by "wrinkles"... will go check out the SM beans photo page now to see if I can figure that out.

As machines go, I love this SC/TO roasting.

Any tricks you can share about forming the  stirring arms?   
Title: Re: One Pound Roaster For under 100
Post by: Alan on July 17, 2013, 06:07:09 PM
We are huge on healthy cooking, I have read allot on Teflon and in my opinion it is very toxic over  time when it starts flaking off and burnt,  using chemicals to remove it???, seems to me the chemicals can get into the porosity of the metal and cause health hazards. I have never heard of any coffee roaster manufacture using Teflon coated devices to roast coffee. None of my hobby roasters have any Teflon on it. I do know even Aluminum at temps over 700 deg can be unhealthy. It is fun building these things on the cheap but we need to be aware of health issues.

Rich

I've had my SC for 11 yrs and no flaking of the Teflon

I've gone through a couple of Supentown SCs and recently bought a SC from Aldi for $35. Instead of the solid heating element it has a spiral element. Works just fine and it puts out a fair amount of light making it easy to see bean color. I thought it would have a short life but has been working very well. I have a Supentown in reserve if needed.

To me this is still one of the most cost effective roasters which gives the user a lot of control and I do on average 14 oz green batches
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 17, 2013, 07:24:20 PM
Any tricks you can share about forming the  stirring arms?

Start from the center, where the arm must form around the bolt in the SC shaft, and work your way out from there, using the stock arm as a guide to help get the correct vertical drop/angle as it comes off the shaft.  From there, it is pretty straight forward to bend the wire into a decent circle.

Also, decide on the basic shape you want, before you get too far into it.  I liked Peter's idea and plagiarized the basic shape from his photos, but wanted it a bit asymmetrical so the "left side" would push through the beans slightly different from the "right side".
Title: Re: One Pound Roaster For under 100
Post by: peter on July 17, 2013, 07:37:27 PM
If you're planning on doing the same batch size all the time, like 8oz. or 12oz., then the stock arms work pretty good and it's not worth the headaches of making a custom arm.  I need something that would roast very small samples, like 125g, so I made the one w/ the hoops because the stock arms just push small batches around in an 'angel wings' formation.  My suggestion to rustic-roaster is to play with it as it is and see if it works for you.
Title: Re: One Pound Roaster For under 100
Post by: 4thJohn on July 17, 2013, 08:12:51 PM
I don't know whats going on with my PC but when I hit the back space I loose all my text...
This is wild, my PC is the same exact thing. When I hit the backspace key... the letters I just typed, go way. I hope this isn't a GCBC virus or something.
Title: Re: One Pound Roaster For under 100
Post by: espressomaker on July 18, 2013, 07:12:21 AM
i roasted with thermometer it makes a huge difference i was finally able to slow the roast down to where i wanted it to be though i believe i ended it too early shouldve let it go till fc. btw does anybody have a way to deal with the increase in chaff?
Title: Re: One Pound Roaster For under 100
Post by: peter on July 18, 2013, 07:40:37 AM
btw does anybody have a way to deal with the increase in chaff?

Increase?  There's roasting methods that make less?   ;)
Title: Re: One Pound Roaster For under 100
Post by: mrjay on July 18, 2013, 07:53:32 AM
... btw does anybody have a way to deal with the increase in chaff?
Does your spacer ring have some manner of chaff chute and if so is it pointing in the correct direction for the CW/CCW direction that your TO fan circulates the air?

In my setup, once the beans are cooled, I use my bean cooler to blow all the chaff off the SC, the table, the patio, and me.   :P
Title: Re: One Pound Roaster For under 100
Post by: rustic_roaster on July 18, 2013, 08:54:37 AM
Any tricks you can share about forming the  stirring arms?

Start from the center, where the arm must form around the bolt in the SC shaft, and work your way out from there, using the stock arm as a guide to help get the correct vertical drop/angle as it comes off the shaft.  From there, it is pretty straight forward to bend the wire into a decent circle.

Also, decide on the basic shape you want, before you get too far into it.  I liked Peter's idea and plagiarized the basic shape from his photos, but wanted it a bit asymmetrical so the "left side" would push through the beans slightly different from the "right side".

Seem like a good idea about the asymmetrical sides, could you tell if it worked to mix the beans?

Guessing vise grip and/or  a pair of pliers should work to do  most of the forming, did you use anything to help form the circle or other shapes?

If you're planning on doing the same batch size all the time, like 8oz. or 12oz., then the stock arms work pretty good and it's not worth the headaches of making a custom arm.  I need something that would roast very small samples, like 125g, so I made the one w/ the hoops because the stock arms just push small batches around in an 'angel wings' formation.  My suggestion to rustic-roaster is to play with it as it is and see if it works for you.

I will most likely do similar size roast of 1/2 to 1/3 of a pound but would like the option to do smaller amounts.  I have done a few 1/2 pound roasts with the stock stir arms and did not notice standing angel wing patterns but I did notice the beans were bunching ahead of the stirring arms in a wave with occasional trailing bare spot.  No real mixing of the outside and inside beans, so I think I need to change from the stock arms.   

Your spring action spacer ring chaff damper worked well, figured I would give your stir arms a shoot too.   


Title: Re: One Pound Roaster For under 100
Post by: peter on July 18, 2013, 10:11:59 AM

Seem like a good idea about the asymmetrical sides, could you tell if it worked to mix the beans?

Guessing vise grip and/or  a pair of pliers should work to do  most of the forming, did you use anything to help form the circle or other shapes?


I will most likely do similar size roast of 1/2 to 1/3 of a pound but would like the option to do smaller amounts.  I have done a few 1/2 pound roasts with the stock stir arms and did not notice standing angel wing patterns but I did notice the beans were bunching ahead of the stirring arms in a wave with occasional trailing bare spot.  No real mixing of the outside and inside beans, so I think I need to change from the stock arms.   

Your spring action spacer ring chaff damper worked well, figured I would give your stir arms a shoot too.

My arms are nothing more than a coat hanger.  Mostly pliers, regular and needle-nose, and hands for the curves.

Finding a design that moves beans to the outside and then the inside would be great; one larger roasts I notice the outside beans get darker because that is where the outflow from the TO hits first.  The TO pull air up in the middle and blows down around the perimeter.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on August 01, 2013, 12:25:42 PM
First 1.3 Lbs of Ethiopion,  charged with 1.6 lbs of greens, the faster 50 rpm motor made a huge difference for a nice even roast. Didn't use any bottom heat just a 1200 watt Turbo oven. Set the heat to 500 deg and let it rip, a nice slow ramp took 18 min to finish, not to bad.  No oil no burnt beans nice even roast, going to try the 1500 watt turbo oven next, maybe shave a little time off. Didn't modify the stir arm used stock Stir Crazy arm the higher rpms made a huge difference. The motor is rated at 14 watt, motor run with full load 13 watts, .22 amps.
Title: Re: One Pound Roaster For under 100
Post by: sea330 on August 19, 2013, 03:25:25 PM
Update on project
2nd run with 50 rpm motor, no bottom heat 17 oz of Honduran yellow bourbon.  15 min  to get in to 2nd crack. This turned out perfect with 50 rpm motor modification. had to purchase  11/16 OD  aluminum round stock cut to 3” length, seems to work great the way  I mounted the motor.  drilled 7mm hole threw the center of the coupling  taped one end with ¼ 20 threads and  drilled and taped a 6-32 threads for set screw  to secure the coupling to the motor. Installed two stock stir arms to the shaft, it really kicked the beans around very nicely.Invested $8.00 for 2 feet of aluminum round stock ,$24.00 for  a 220 volt ac motor,  $11.00 for the 110 to 220 volt  voltage converter, $ 6.00 for a stir crazy from thrift store, $25.00 for the Galloping Gourmet turbo oven that I purchased a couple of years ago from a yard sale, Add a temp meter and a K type TC you will stay under $100.00 bucks. Spent  allot of time figuring things out but now I could throw one together in a couple of hours easy. Bet you could roast 1 ½ lbs with the motor and stir arm mod.

12 :24 pre heat to 300°
12:27  added  beans
Dryed for 3 min
12:30 set temp to 450°
12:34 400° bean temp
12:35 418° 1st crack
12:39 start  2nd crack
12:39:20 sec  finish 445°
Title: Re: One Pound Roaster For under 100
Post by: sea330 on August 19, 2013, 03:34:57 PM
 Picture resizer software not working of the motor mounting will post later. Had to reload software all good.