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 SC/GG project
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| miamichillin99 |
Posted on 06/13/2012 4:29 PM
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 Newbie  Posts: 21 Joined: May 10, 2012 |
I have finally completed my Stir Crazy Galloping Gourmet 1440W Turbo Oven. I bought the SC on ebay for $20 (little did I know i could buy a new one for the same price at Target) and the GG on Craigslist for $20 as well. I built my own metal shaft and I built a woz chaff ejector according to his instructions on this page. http://turbocrazy...roject.htm Also I sealed the top of the chaff ejector with silicon tubing from U.S. plastics: http://www.usplas...d=redirect Item #54032 (only $11 with USPS shipping for 10 ft.) I tried sealing the bottom too but I left the Woz chaff ejector so tight against the lip of the SC that the tubing didn't fit. I will upload some pics tonight. The center copper cap of the metal shaft was dremel'ed with slits so that it sits better on the stir arms. I didn't modify the stir arms yet but I'm thinking about it. The metal shaft is held in place by wrapping the bolt and the motor plastic shaft with plumbers tape so that it all fits so snug that it doesn't come off. I hope it holds up to the heat. I just purchased some green beans Sumatra Medheling and I'm about to undertake my first roast ever!!!!!! Any advice on how to do it? Should I adjust the temperature dial on the GG throughout the roast? Should I preheat? What's a good batch size for optimal results with the standard un-modified stir arms? Thanks again to this great forum for providing all the info I needed to get this far and I hope my first roast is a success!!! Or at least drinkable. ;-) |
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| JackH |
Posted on 06/14/2012 3:08 PM
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 Administrator  Posts: 1809 Joined: May 10, 2011 |
Hello! When I started out with the original stir crazy I was doing 300-350g of beans. It seemed to be the max for the original SC motor and arms. The SC motor will reverse if it encounters resistance so you may see it go back and forth. I did go with the plumber's tape too for a while then went with a different motor/arm setup so I can't say if the tape holds up long term. The thermostat in the turbo oven will turn the heat on and off at it's set point and is not very accurate. The temperature swings were wide for my oven so I separated the heater and fan (each has an AC cable) and removed the thermostat. I used a Variac to control the heater. Do you have a way to measure temperatures? When I was running with the original thermostat I would preheat at 300F for 5 minutes then add the beans. Then set the thermostat to 400F (sometimes I would use max setting). You have to listen for first crack and back off the heat. All of this you will have to experiment with for your setup. Give it a try and have fun! --Jack |
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| pnguser123 |
Posted on 06/15/2012 6:53 PM
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 Newbie Posts: 3 Joined: June 14, 2012 |
Jack, I also roast with a Stir Crazy and Turbo Oven. I replaced the center shaft with a pen making bearing. It has a 1/4 hole in the center and I pressed it into a hole that I had drilled in the bottom plate of the Stir Crazy. This keeps the shaft from wearing out. I also added a gap in the aluminum ring that is recommended as a spacer between the Stir Crazy and the Turbo Oven. This allows the air flow to push the chaff out of the roaster and not burn. I pretty much run the roaster at full temperature for the entire roast. It take about 12 minutes from start to finish. I have used one of my roasters for 6 years and roasted hundreds of 3/4 pound roasts. I just built another one so I could rotate roasts and not spend so much time roasting. See my site at http://philsroast...tures.html Phil Lived in Papua New Guinea, Been roasting for 8 years, I use twin Crazy Stir/Turbo Oven roasters. Now live in Sanford Florida.
Phil |
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| miamichillin99 |
Posted on 06/15/2012 9:12 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
Thank you both for your advice. I finally decided tonight after a few beers to man-up and just go for it. I did two batches of 4 oz as I did not want to waste any coffee. And I'm glad I did that since I think I burned them both. They ended up very dark and oily. I was listening to the cracks and I heard 1C at 14mins on the first batch and 10mins on the 2nd batch. The problem was that I never heard the cracking stop. From my research I thought that 1C happened, then stopped and then you waited a few minutes and then 2C started. Since I just heard constant cracking both times it never occured to me to 2C had begun. Is 1C suppose to continue straight into 2C? How do you tell them apart? I finally stopped the first batch at 18mins(or 4 mins after 1C started) and I stopped the second batch at 14mins(again 4mins after 1C started). What did I do wrong. I even stretched the drying phase by keeping the dial set to 350F until they turned yellow. I have not bought a Variac because they are so expensive. Well as promised here are my pics.
miamichillin99 attached the following images:
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| miamichillin99 |
Posted on 06/15/2012 9:17 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
As you will see my cooling setup is the following and worked great. They were cool to the touch in under a minute: 1. Honeywell fan 8" diameter 2. Walmart colander (mainstays brand) also 8" 3. Red plastic container (for plants) also 8". I cut the bottom of the container off and made it a cylinder. I then placed the 8" top-end which is wider on fan the placed the colander on the narrower bottom end of the pot. In the picture the colander is sitting in a 8" cooking pot. I did this so I could quickly grab the burning hot stir crazy and dump the beans without worrying that the colander would fall off the fan. Then once the beans were all in the colander I just picked it up off the pot and put it on the fan. |
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| pnguser123 |
Posted on 06/15/2012 9:37 PM
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Newbie Posts: 3 Joined: June 14, 2012 |
In my experience of using this setup, the 1C sounds much louder than the 2C. The 2C is more of a snap. If it snaps rapidly you are already into a City + roast. I usually do not roast that few of beans. They roast too quickly. I use 2 1/2 cups of green beans each time.
Lived in Papua New Guinea, Been roasting for 8 years, I use twin Crazy Stir/Turbo Oven roasters. Now live in Sanford Florida.
Phil |
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| miamichillin99 |
Posted on 06/15/2012 9:51 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
1C and 2C sounded the same to me. That's why I didn't stop it sooner. Maybe I'll try roasting more beans... |
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| JackH |
Posted on 06/16/2012 6:34 PM
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Administrator Posts: 1809 Joined: May 10, 2011 |
I agree that you need more beans with that setup. that GG turbo oven is very powerful. It may be hard to control with so small a volume of beans. 2C always sounds like snapping wooden matchsticks to me, and 1C seems more like a louder pop. I learned the difference by bringing a roast well into 2C on purpose (I like to say it was on purpose). If the heat is very high, and with a small volume you probably moved right into 2C very quickly. Are you using the 1 1/2 inch high spacer ring? |
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| miamichillin99 |
Posted on 06/16/2012 7:45 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
Quote JackH wrote: I agree that you need more beans with that setup. that GG turbo oven is very powerful. It may be hard to control with so small a volume of beans. 2C always sounds like snapping wooden matchsticks to me, and 1C seems more like a louder pop. I learned the difference by bringing a roast well into 2C on purpose (I like to say it was on purpose). If the heat is very high, and with a small volume you probably moved right into 2C very quickly. Are you using the 1 1/2 inch high spacer ring? Yep my spacer is 1.5" high |
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| miamichillin99 |
Posted on 06/16/2012 8:32 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
I just tried the coffee I roasted and it was ashy and smelled burnt. Oh well in the garbage I guess. |
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| miamichillin99 |
Posted on 06/17/2012 8:30 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
I did my third batch and threw away the first 2 batches that were burnt. Here's a pic of the third. I will brew it tomorrow. Thanks Jack for the tip on increasing the batch size. I think it helped. I also turned down the temp on the dial. Thiks sucker is powerful. Actually I just realized it's the 1470W unit, not the 1440W. Preheated oven at 325F for mins Then put 1/2 lb of green @ 325F and started the timer 9:45mins upped the temp to 350F as the beans were completely yellow 12mins upped to 400F 14:43mins 1C 15:40mins upped to 425F 16:20mins stopped roast.
miamichillin99 attached the following image:
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| JackH |
Posted on 06/18/2012 5:46 AM
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Administrator Posts: 1809 Joined: May 10, 2011 |
The roast looks good. Sometimes it takes several days rest for the best flavor. Your 1C time is too long, I try to get to it in about 9 minutes. Too long a drying time can remove too much moisture that is needed later. The Sumatras are not easy for me to roast. They are a softer bean and scorch easy. You will be experimenting on the times and timing of the roasts as you go and it is part of the fun. |
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| miamichillin99 |
Posted on 06/18/2012 7:57 AM
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Newbie Posts: 21 Joined: May 10, 2012 |
I tried it today and it's a bit too bright for my tastes. I think I under roasted it. The beans definitely have a lot of moisture left in them as the 21g I weighed out barely reached 3/4 up my triple basket. Usually it will overflow a little. |
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| miamichillin99 |
Posted on 06/18/2012 9:00 AM
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Newbie Posts: 21 Joined: May 10, 2012 |
Quote JackH wrote: The roast looks good. Sometimes it takes several days rest for the best flavor. Your 1C time is too long, I try to get to it in about 9 minutes. Too long a drying time can remove too much moisture that is needed later. The Sumatras are not easy for me to roast. They are a softer bean and scorch easy. You will be experimenting on the times and timing of the roasts as you go and it is part of the fun. Jack What profile do you recommend? Should I keep the temp @ 325 for less time? |
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| JackH |
Posted on 06/19/2012 6:14 AM
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Administrator Posts: 1809 Joined: May 10, 2011 |
I usually preheat to 300F for about 5 minutes then drop in and increase heat (Max) to get the beans yellow in about 4-5 minutes. I can view the bean temp and see the rate that it rises in degrees per minute. I adjust heat for about a 30 degree/min rate. When approaching 1C, I reduce the heat to prevent going too quickly. But you don't want to reduce too much that it stalls the roast. You can lift the turbo oven and set down again to "burp" and reduce the heat if things are going too fast. Usually 3 minutes after 1C is when I dump. You can go longer for darker roasts but I like lighter roasts. I am getting good at smelling the smoke change from a acidic to a sweeter smell. Without temperature monitoring, I think you will have to use visuals and view the bean color as you go. I think you went with too low a heat level for drying. I am surprised you say it is bright, usually you get a sour taste with not enough drying. I hope this helps, It is general but seems to work for my setup. |
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| miamichillin99 |
Posted on 06/19/2012 9:33 AM
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Newbie Posts: 21 Joined: May 10, 2012 |
Thanks for the profiling tip. I just bought a variac as well that I should be installing soon. Not sure if I used the correct word but by bright I meant fruity and light flavored. Unfortunately it produced almost no crema and I had to grind much finer than usual. |
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| miamichillin99 |
Posted on 06/22/2012 3:00 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
I'm happy to report my first successful roast!!!!!!! I roasted 1/3lb of Costa Rica Santa Anita using the following profile: Preheated for 5mins @ 400F Started roast and reset timer @ 400F 7mins early beginnings on 1C 7:30 rolling 1C. Started burping to release heat and turned dial down to 350F 8:40 end of 1C 9:30 upped temp to 450F 11:30 early begginings of 2C and ended roast.
miamichillin99 attached the following image:
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| miamichillin99 |
Posted on 06/24/2012 9:52 PM
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Newbie Posts: 21 Joined: May 10, 2012 |
And now my second successful roast. I tried to extend 1C a little more and got more than I thought. Preheated at 350F Started at 350F with 1/3 lb of Costa Rica Santa Anita at 7:30 went to 400F 11mins 1C started 11:30 1C was rolling (I burped and turned dial down to350F) 12:30 1C stopped 14:30 turned dial to 450F 18mins 2C started and I stopped roast. BTW I tried my first successful roast and it was pretty good. Thank you all again! None of this would have been possible without the great people on here and Jeff from RedBird Coffee. |
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| JackH |
Posted on 06/25/2012 3:01 AM
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Administrator Posts: 1809 Joined: May 10, 2011 |
Glad to see the roasts doing better. Looks like you have a good profile for the Costa Rica beans. |
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