Thanks everyone for the suggestions.  Hottop customer service said I could 
replace their main board with my own and write a program, yeah right!  

Ira, I understand your idea in principle, but not in execution.  I guess I need 
to research how the sensor sends its data to the program board--if it's some 
sort of switch inline, I can easily trick it.

The idea of using a vacuum to pull air through the roaster is probably the most 
practical, followed by Barry's idea of taking the front off and letting it cool 
with a fan blowing in the front.

Will see how it goes--currently it takes about 10 minutes to preheat, 22 or so 
to roast, another 20 or so to cool, and then a few more to re-heat for the next 
batch.  The re-heat can't be helped, but maybe the cooling can be reduced a lot.

I'll report back when I have some data.

bmc

On Oct 24, 2010, at 6:10 AM, 187 wrote:

> Would a blast of cold air on the temp sensor allow the cycle to start?
> 
> On Oct 21, 5:01 pm, Benjamin McCafferty <[email protected]> wrote:
>> Yeah, well out of warranty anyway.  I have added a temp probe near the 
>> button sensor you described previously to measure bean temp instead of 
>> environment temp--as an aside, what a HUGE difference that made in my 
>> roasting!  Feel like I was blind before.
>> 
>> Back to the question at hand, I don't understand how a switch inline there 
>> would help.  If it was open, would it make the machine think it was cold, 
>> i.e. no signal from the sensor?
>> 
>> Thanks and talk soon,
>> bmc
>> 
>> On Oct 21, 2010, at 12:30 PM, Barry Luterman wrote:
>> 
>>> The temperature sensor is the round shiny structure on the back wall
>>> of the roast chamber. I would guess there is a connection to the
>>> sensor behind the rear wall. A switch might be spliced in there. Of
>>> course it will probably void any warranty you have on the unit
>> 
>>> On Thu, Oct 21, 2010 at 11:30 AM, Ira <[email protected]> wrote:
>>>> At 08:54 AM 10/21/2010, you wrote:
>> 
>>>>> hmmm...how would the switch lie--would it simply bypass the temp probe
>>>>> that tells the brain what temp is?  I.e. is the temp probe connected to
>>>>> something that closes above 163, then opens when it's below, such that the
>>>>> switch could go into place ahead of that and be opened/closed to mimic the
>>>>> other part?
>> 
>>>> Not having a HotTop I couldn't say, Figure out what type the sensor is and
>>>> then it's easy to solve the problem.
>> 
>>>> Ira
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