HomeRoast Digest


Topic: OK, so I was way wrong ... (15 msgs / 362 lines)
1) From: Jim Schulman
I used to think plugging my FR, fan and heat 
together, into the variac was just fine. Now I've 
just finished 6 roasts with the fan on full power, 
the heater variac controlled, and Wow!
Using a slow voltage/temperature ramp up, I got to 
340F with the beans completely even, not the usual 
mottley bunch, and it only took 4 1/2 minutes 
instead of the usual 3 1/2.
Also, I had no problem doing my profile test: 
Black Bear (30F/min through the first, 10F per 
minute ramp thereafter) versus Staub (dead 
straight 20F/min throughout). Each roast took the 
same amount of time, and ended at the same 
temperature (the Black Bear roasts were a little 
darker). I kept the temperature ramp within a few 
F of target at every 30 second checkpoint.
Cupping results on Sunday.
Jim Schulman
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2) From: Mike McGinness
From: "Jim Schulman" 
<Snip>
I felt the same way the first time I Rosto roasted after splitting the
heater & fan, heater variac controlled fan wall 120v. Much better results
than fan & heater tied together controlled by variac. It got even better
when I added variable transformer to the fan too! Pushing 140v fan at start
enables larger batch size with good bean movement, as they dry reducing fan
voltage to maintain good but not run away movement. I love it!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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3) From: John Abbott
Mike, what do you suppose your total cost to be now on the Rockin' Rosto?
I'm betting you've closed in on the price of the HotTop :O)  Now all you
need to do is computerize the variacs and you're there.
John - wishing I had more counter space!!

4) From: John Abbott
Mike, what do you suppose your total cost to be now on the Rockin' Rosto?
I'm betting you've closed in on the price of the HotTop :O)  Now all you
need to do is computerize the variacs and you're there.
John - wishing I had more counter space!!

5) From: Mike McGinness
From: "John Abbott" 
<Snip>
Actually yes and no. Actually no. Could just cost Rosto $129, 10A used
Powerstat variable autotransformer US built like a tank rated 225% overload
for 40min $36, fan transformer boost dimmer $20, cheapo $3 DMM making total
cost for total controlled 1/2# batches $188. Oh, I forgot $10 for Weber BBQ
5-1/2" probe 550f bi-metal thermometer so make that $198. However, two
Rostos and my in progress self contained roast control unit with indicator
lights for master on (green), fan (amber) & heater (red); mechanical timer
switches for heater & fan; true RMS AC digital panel meter etc etc etc will
run a bit more:) Though the HotTop is easier to use I'm sure, I'm just as
sure my type of setup offers much better profile control than is possible
with the HotTop.
Rockin' Rosto Roasting is a thing of the past since splitting the heater &
fan. No longer necessary! Just crank up the fan to 140v for 1/2# greens bean
movement.
When I get the controller built with pic's etc. online I'll include a cost
breakdown... And lesser cost design options for those not quite as nuts as
me!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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6) From: John Abbott
Mike, Mike, Mike!  You could make vinegar with those grapes :O)  You have
accomplished with a counter full what the HT does in a VERY small footprint.
It varies the fan, it monitors the ramp speed of the profile - and it
produces 1/2 pound of great coffee per load.  I still have control over the
ramp and the dump points.  I'm VERY satisfied with the HotTop now that I've
make the last two production changes - and new chip set - and now that I've
learned not to handle it while running ;O)

7) From: Oaxaca Charlie
 You sure told him, John. And that solis m5k makes just as good
double espresso shots as Mike's Silvia, too!  ;o)
Chas.
--- John Abbott  wrote:
<Snip>
=====
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8) From: John Abbott
Well - Only if we want to pull about a dozen shots of the same bean.  Miss
Silvia has her advantages.  I have no doubt the Maestro Mike can play a full
symphony of flavor on those dials and meters - I'm a coffee/music lover and
respect the art. HOWEVER! IF I were a meat eater - I might show up at his
BBQ with my New Fangled HotTop under my arm ;O)

9) From: Mike McGinness
From: "John Abbott" 
<Snip>
Hmmm, a good 25yr aged Balsamic goes for about $40 an oz, better be a
gettin' them barrels filled!
<Snip>
footprint.
Actually probably about the same counter space if the HotTop is near the
same size of an Alp...
<Snip>
the
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I've
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I've
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Now if they'll just get the darn thing to the US market, and under $500 or
even under $400 would be better. Not that it concerns you, you've got
yours:)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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10) From: Mike McGinness
From: "John Abbott" 
<Snip>
full
<Snip>
and
<Snip>
Vege' Q can be included! Corn on the cob (in the husk is best: open 'em up
to let some butter & pepper in, close & Q), taters, green maters (Debi
likezies), squashies, peppers (hot &/or sweet), onions, shrooms (stuffed
&/or plain), lots of possibilities...
Then a Showdown,  High Noon at Kona K Korral. John loads his HotTop and I
fire back with my dual variable transformer controlled Rosto. We'd be
SMOKIN'!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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11) From: John Abbott
Hmmm... I would be a leanin' if'n you were a fix'n to do it bout July - when
me an maw might be headen west agin.
How long would it take to drive up from San Francisco - 7 hours?  Streets &
Trips says about 9 hours, but then they assume long stops and legal speeds
:O)  We are planning a trip back to the bay in either July or August - and
I'll be driving so I can drag my toys with me.  We'll cogitate.

12) From: AlChemist John
Sometime around 22:41 1/31/2003, John Abbott typed:
<Snip>
How big is the HT?
<Snip>
Can you actually change the ramp rate?
<Snip>
Ouch
<Snip>
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
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13) From: Mike Gallant
On Friday, Jan 31, 2003, at 22:09 US/Pacific, Mike McGinness wrote:
<Snip>
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two
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	All that, and no PID for Miss Silvia yet? ;) Once you go PID, =
you 
never go back...
--mike
--
Mike Gallant
Living in PID'd bliss for the past 2 weeks...
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14) From: Jim Schulman
On 31 Jan 2003 at 21:34, Mike McGinness wrote:
<Snip>
Makes sense for upping the batch size. At the 
moment, I'm doing a lot of blend and roast 
variations, and even the small size gets me more 
coffee than I need. When I'm off the experimental 
kick, I'll probably go for it.
<Snip>
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15) From: Ron Ehsani
Mike, Can the fan in Rosto handle 140V?  Is is designed to?  I thought they 
are designed for 110-120V.  Isn't there a chance of burnout or worse, fire?
<Snip>
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