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Topic: from scratch roaster project (16 msgs / 395 lines)
1) From: Justin Schwarz
I have a friend who has programming experience that would like to build a roaster from scratch.  I have 2 questions for anyone that has built an electric roaster from scratch. What could I use for an element? And, what could I use for an exhaust fan that would be able to handle the heat of the roaster exhaust.
It's been a while since we've had a discussion along these lines, Calling all great minds that are still here! 
-Justin
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2) From: Steve Scigliano
I have not built one but here are some thoughts:
I would push the air in instead of pulling it out. I would have the fan push 
cool air over the heating element and into the the roasting chamber. This 
eliminates the need for a high temperature fan (read you could use almost 
anything that blows air)
Steve

3) From: Mike Koenig
There is the replacement element for a HotTop,  but they aren't all that
cheap.  I'm wondering about small water heater elements, though I suspect
they will self-immolate if not immersed in water.
Maybe the coil elements from an electric stove?
(just tossing out ideas...)
--mike
On Mon, Feb 25, 2013 at 10:15 PM, Justin Schwarz wrote:
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4) From: Rich
Water heater elements will work just fine as long as you control the 
applied voltage to control the temperature and current.
On 02/27/2013 09:01 AM, Mike Koenig wrote:
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5) From: Dave
You could cannibalize a heat gun...
Already has at least a small fan, and a heating element...
Dave
Some days...
It's just not worth chewing through the leather straps
On Wed, Feb 27, 2013 at 7:47 AM, Rich  wrote:
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6) From: J3R
On 13-02-27 10:47 AM, Rich wrote:
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A heatgun seems to fit the bill, and could be controlled with a variable 
power supply, plus with venting.
Jeremy
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7) From: Ira
At 07:01 AM 2/27/2013, you wrote:
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Blow in so the fan doesn't see heat.  Look at thrift stores for 
toaster ovens with rod elements if you want radiant heat or maybe 
abandoned electric dryers if you can use 220.
Ira
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8) From: Michael Wascher
The last electric dryer I tore into had a 4" diameter tube with a fan &
heating element in it. Also a couple of overtemp switches for safety. It'd
be a nice assembly to build a roaster around.
Yes, it is 220V but to my way of thinking a 120V outlet is marginal for a 1
lb or greater roaster.
*"**You risk the most if you don't risk anything."*
 Jean-Claude Juncker
On Wed, Feb 27, 2013 at 5:09 PM, Ira  wrote:
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9) From: John Nanci
I'm currently roasting with my third iteration of =
a from scratch 110 V electric roaster.  1 lb is =
no where close to marginal.  I do 1 lb week in, =
week out (12-13 minute roast).  1.5 lbs  on =
occasion (15-16 minutes) and have gone full out =
with 2 lbs and still was under 20 =
minutes.  Granted 20 amps, but 15 amps will still =
do 1 lb without flinching....if you design right :)
I've had my best luck with small 'habatchi' style =
heater coils.  Very durable, consistent, =
cheap.  Nichrome as much as I want to love it =
seems to burn through on me (note to self - check about larger gauge).
As for a draw fan - I'm going to suggest pulling =
the heat still.  If you push the air, it (and =
smoke) is going to exit everywhere you don't have =
good seals.  EVERYWHERE.  With pulling it's only =
where you want it.  As for heat proof, since you =
are building from scratch, I suggest any old =
small motor.  C frames are great.  Extend the =
shaft, mount a metal impeller wheel, and away you =
go.  Instant heat proof fan.  If you want it =
REALLY heat proof, don't directly mount the =
impeller shaft to the motor, but drive it via a =
gear or pulley.  No heat transfer at all that way.
Have fun!
John Nanci,
Alchemist at large
At 08:51 PM 2/27/2013, you wrote:
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10) From: gin powell
Ira:
why not post your project onhttp://www.homeroasters.org/php/news.phpwe have a lot of folks making roasters from scratch.
ginny
On Wed, Feb 27, 2013 at 9:51 PM, Michael Wascher  wrote:
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11) From: Terry
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12) From: peter zulkowski
This looks like it may be a good engine for a roaster :)http://www.dailysteals.com/heist/8270/Halogen-Convection-Oven?utm_source==DailySteals.com+-+Deal+of+the+Day&utm_campaign=c1eb5ea30d-04_22_13_Dental=
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On Thu, Feb 28, 2013 at 12:07 PM, gin powell  wrote:
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13) From: Jason Brooks
Interesting.  Wonder what it's heat output is?
Jason Brooks
brookswvhttp://javajeb.wordpress.comOn Mon, Apr 22, 2013 at 10:46 PM, peter zulkowski wro=
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14) From: gin powell
http://www.amazon.com/Rosewill-R-HCO-11001-Halogen-Convection-Oven/dp/B005E=HQN4Q/ref=sr_1_fkmr1_1?ie=UTF8&qid=1367180410&sr=8-1-fkmr1&keywords=
=Rosewill+Infrared+Halogen+Convection+Oven+R-HCO-11001+with+Heat+Resistan=
t+Glass+Bowl+and+Easy+To+Use+Dial
On Wed, Apr 24, 2013 at 6:39 AM, Jason Brooks  wrote:
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15) From: Larry Dorman
Looks very similar to my turbo oven... Are you going to use a stir crazy
base or something else?
On Apr 28, 2013 3:22 PM, "gin powell"  wrote:
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16) From: Owen Davies
Rosewill's website rates this unit at 1000W to 1200W, 1300W peak. It 
sounds perhaps a little underpowered for coffee roasting.
Owen
/*Lurk mode on*/
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