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GG/UFO Chaff venting question: What size hole or slot?
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Radixb
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Radixb
Joined: 14 Jan 2013
Posts: 17
Location: Lafayette, IN
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: Kyocera CM-50, PeDe Dienes...
Vac Pot: Knapp Monarch, Sunbeam
Drip: Aeropress, Chemex, Melitta...
Roaster: SR300, GG/BreadMachine
Posted Tue Jan 29, 2013, 4:11pm
Subject: GG/UFO Chaff venting question: What size hole or slot?
 

Ok, so you might think I'm a little crazy here.... I just finished building the Breadmachine drive, and now I have a UFO question.  A guy needs a backup roaster, right?  Plus, I'm not happy with how fast the bread machine stirs, and slowing it down is going to require swapping motors to something I can dial voltage back on (i.e. DC).  

So I am going to try the UFO combo.  I have a springform that I will be using to space the GG up, and want to integrate a removable chaff collector using a small drink mixer/shaker.  With the UFO, I'm not worried about beans being "launched" through the chaff vent, so I'm wondering what size hole to drill in the springform?  I can go up to 3/4" round, or 1/2 X 1" slot.  A hole is a lot easier to machine than a slot for me.

By the way, the cocktail shaker cap is SS, and it will be perfect as a food-safe wing-nut cover.

 
-Reuben
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Radixb
Senior Member
Radixb
Joined: 14 Jan 2013
Posts: 17
Location: Lafayette, IN
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: Kyocera CM-50, PeDe Dienes...
Vac Pot: Knapp Monarch, Sunbeam
Drip: Aeropress, Chemex, Melitta...
Roaster: SR300, GG/BreadMachine
Posted Thu Jan 31, 2013, 6:34pm
Subject: Re: GG/UFO Chaff venting question: What size hole or slot?
 

So I roasted 14 oz of Huehue last night in the UFO base.  What I liked was how quiet it was compared to the bread machine combo.  Unfortunately, I think I need to dial back my temps.  Due to the much slower stir speeds, the roast was uneven compared to my previous roast with the bread machine combo.  My Aeropress brew tonight from that roast had distinct "char" elements in the mouthfeel, even though visually it looks identical to the roast from the breadmachine base and I pulled both roasts as soon as I hit second crack.  I did have to cull some beans that looked burnt and one that looked like it found a cool place to hide.

 
-Reuben
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Prof
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Prof
Joined: 10 Sep 2004
Posts: 703
Location: Seattle
Expertise: Pro Roaster

Espresso: PV Lusso
Grinder: Pharos 696
Drip: Aeropress
Roaster: Behmor 1600+
Posted Thu Jan 31, 2013, 7:34pm
Subject: Re: GG/UFO Chaff venting question: What size hole or slot?
 

Radixb Said:

So I roasted 14 oz of Huehue last night in the UFO base.  What I liked was how quiet it was compared to the bread machine combo.  Unfortunately, I think I need to dial back my temps.  Due to the much slower stir speeds, the roast was uneven compared to my previous roast with the bread machine combo.  My Aeropress brew tonight from that roast had distinct "char" elements in the mouthfeel, even though visually it looks identical to the roast from the breadmachine base and I pulled both roasts as soon as I hit second crack.  I did have to cull some beans that looked burnt and one that looked like it found a cool place to hide.

Posted January 31, 2013 link

When I used my SC/TO, I found that about 10oz was the maximum size that seemed to roast pretty evenly.  YMMV.

Some people put wide washers (rollers?) around the rotating arms to slightly raise the arms to help with bean movement.  

The wide heat band (deadzone) can be a pain with getting the temperatures where you want them.

 
LMWDP # 010
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