HomeRoast Digest


Topic: Bimodal roast times with HWP (31 lines)
1) From: David Lewis
Normally, for a given bean and temperature, my HWP is very consistent 
in roast time. Occasionally, though, I'll get a roast that is much 
shorter. This morning, for instance, I was roasting Malabar Gold. Two 
batches, same weight to the gram, same air temperature within a 
degree (73 F). After the first batch, which took 10:05 having 
reached second crack at 9:30, I cleaned the chaff out of the roaster 
and ran it through an extra cooling cycle, empty, to really cool 
everything off. This is my normal procedure. The second batch reached 
second crack at 8:15! This has gone on for a while, and only happens 
occasionally. It's bimodal, though: I'll never get a roast between 
those times. I thought it was chaff partially blocking the outlet, 
distributing itself unusually evenly over the screen. Accordingly, I 
tried running the first 2:30 with only the lower part of the chaff 
collector on the roasting chamber, then putting the screens on (while 
it was running). This allowed most of the chaff to come off first, 
and the vents to stay open, but the problem still happened. I suppose 
I could monitor the voltage while I'm roasting, but I wondered 
whether anybody else had seen this.
	David
-- 
"Every gun that is made, every warship launched, every rocket fired, 
signifies in the final sense a theft from those who hunger and are 
not fed, those who are cold and are not clothed."
	--Dwight D. Eisenhower
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