HomeRoast Digest

Topic: [Re: [Re: +Variable Roast Times - HIP]] (5 msgs / 90 lines)
1) From: Rick Farris
"Steven Dover"  wrote:
I assume, then, that you're running a popcorn popper and added another po=
cord.  Is that true?  Has anybody tried lowering the voltage on a HIP, or=
other dedicated roaster?
-- Rick
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2) From: Mike McGinness
From: "Rick Farris" 
Has anybody tried lowering the voltage on a HIP, or
Two of us (that I know of) have the 20amp Variac on it's way for use with
Caffe' Rosto. I also have a Weber large dial thermometer (up to 550f, long
probe, no large mounting thread, $14.49 inc s/h) on it's way. More will be
Home Roasting in Vancouver, WA USA
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3) From: Steven Dover

4) From: Charlie Herlihy
 I also have a Weber large dial thermometer (up to 550f, 
Home Roasting in Vancouver, WA USA
Hey Mike, does that thermometer have a plastic cover, or can it go where it really gets hot. I'm still trying to find something to measure my bean temp. while they're turning in the brick oven.
charlie,  always waiting for more to be revealed...
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5) From: dewardh
I have . . . but I now use the variac (with the HIP) only to insure that 
voltage is sufficient for "normal" operation.  Low voltage reduces agitation, 
to no notable benefit.  Not only is the fan noticably slower (at "slow"), but 
it doesn't cycle to "high" as frequently or for as long, so agitation suffers 
both ways.
With the Caffe Rosto being able to control supply voltage, especially if you're 
in a low voltage situation, can determine whether you can roast successfully or 
not.  I have had the opportunity to "test" a CR that was returned as "couldn't 
reach second crack" using the same 20 A. variac that others here have, or have 
ordered . . . at 118 V. it produced a darker-than-I-intended Vienna roast in 
about 10 1/2 minutes.  My "healthy" CR at the same voltage brought the same 
bean (Brazil Mogiani) to about the same roast in 9 - 9 1/2 minutes.  Clearly 
there is some "sample variation" between the two, and the "hotter" one would 
work at a voltage where the "cooler" would fail, but I cannot call the cooler 
one "defective" . . . it works just fine *with adequate line voltage*.
Roast times with the CR are very dependent on voltage . . . a disadvantage in 
some circumstances, obviously, but a great advantage if you want to control 
roast time and profile with a variac.
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