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Topic: Hearing 1st and 2nd crack (2 msgs / 28 lines)
1) From: Dave Bush
Well, I finally finished my PIDed Turbo Crazy. My target was 1 pound and the Stir Crazy base just couldn't reliably handle that many beans so I trashed it. I replaced it with a Welbilt bread machine base mated with a stainless mixing bowl that is working very nicely. The thermocouple is in a good location and the PID control is working like a champ. My problem now is hearing the cracks. I used a popcorn popper previously and could easily hear the crack progression and stop the roast exactly when I wanted. However, with the Turbo Crazy I'm having a hard time hearing the cracks due to it being enclosed and the whole arrangement being noisier. I can crack open the cover and hear the cracks somewhat, but not nearly as well as I'd like. I'd use temperature as an indicator, but the temp profile doesn't match what I got with the popper so while it would be useful it's a meaningless data point until I can hear the cracks better. Any ideas? I was thinking of modifying a mechanic's ste
 thoscope and slipping the open end into the bowl, but that might look kind of goofy. Of course, that's never stopped me before.
BTW, the Sivetz-like roaster is on the back burner for now. Too many other projects.
Thanks,
Dave
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2) From: Bill
the stethoscope sounds like a decent idea.  I have no decent ideas...  You
wouldn't need the stethoscope for long, once you got the temp readings
dialed in...
bill in wyo
On Wed, May 21, 2008 at 8:47 AM, Dave Bush  wrote:
<Snip>
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