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Topic: 1/2# Rosto roast no rocking good bean movement! (9 msgs / 158 lines)
1) From: Mike McGinness
This evening I test roasted my newer Rosto for the first time since
splitting the heater and fan power inputs this weekend. First batch my usual
weighed 1/3#. Interestingly I only needed about 120v fan to achieve same
bean movement at start of roast I get with my older Rosto full bore 139v to
fan. (I've never used this Rosto straight line voltage, only heater/fan
variac controlled in tandem which seldom reached even 120v.) Rest of roast
process went expected.
Then thought hmmm, I wonder if the newer Rosto with boosted fan can handle
1/2# without rocking aid? Weighed out 127gr Mexican Octovio's Prima Lava 02
and went for it. Initial bean movement slight with fan full 139v, about what
my other Rosto achieves 1/3# greens. Cool! Forced myself to not touch the
Rosto the entire roast. (which was hard to do after using the "Rockin'
Rosto" technique for almost two years:-) Was able to maintain good bean
movement entire roast, though never did get the fan reduced to120v. Max
heater voltage required towards end of 14min 440f light full city roast
119v. Resulting roast very beautifully even. Now the real test, count the
beans in the chaff collector! I'd forgot this bean is very chaffy and didn't
de-chaff before roast and consequently the primary chaff collector was full.
Carefully emptied looking for beans, ZERO! My most careful rocking technique
seldom if ever got zero beans in the collector on a 1/2# batch.
Oh, the 25.2v boost transformer was slightly warm to the touch after running
139v full out most of 18min including cool down. And that after just running
a previous batch 120to115v. Also, it took 4min to cool 1/2# batch to 120f
instead of 3min on 1/3# batch. (Ambient was 42f)
I be a happy roaster. Way satisfied. Who needs a HotTop for 1/2# batches!
(Just lots of modifications and gadgets, but the cost substantially less
including both Rostos!)
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
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2) From: dewardh
Mike:
I'm trying real hard to find some down side to the Rosto modathon . . . so far, 
no luck .  It may be a good idea to start watching the roast air (heater) 
temperature more carefully . . . but since you're *boosting* airflow 
(presumably lowering temperatures) to extend the roasts overheating may not be 
a problem.  Unless, of course, the heater voltage starts going up for the 
bigger batches .
<Snip>
de-chaff before roast and consequently the primary chaff collector was full.
This, and accurate bean temperature measurement (measuring roast air is easy), 
are what I see as the two remaining "problems" to be addressed on the Rosto. 
 The mechanical "adjustable airflow" mod I was toying with vents out through 
the lid, so only recirculating air goes through the (internal) chaff filter. 
 That pretty much resolves the clogging problem, but it does require fitting an 
external chaff filter of some sort . . . something I haven't addressed just 
yet.
<Snip>
Life is good . . . sometimes . . .  . . . congratulations.
Deward
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3) From: Ben Treichel
Mike McGinness wrote:
<Snip>
Hey miKe didn't you mean 227 grams? Or are you 4oz short of a half lb?
<Snip>
Miss Typing :-D
<Snip>
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4) From: AlChemist John
Sometime around 18:55 1/13/03, Mike McGinness typed:
<Snip>
MM, its early, I'm not even thought my first cup yet, but isn't 127gr about 
4 oz or 1/4#.  Did you weigh this out twice?
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
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5) From: Ben Treichel
Hey John, I gig'ed miKe on this first! Its mine, mine, mine, mine,  :-D
AlChemist John wrote:
<Snip>
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6) From: AlChemist John
Sometime around 07:00 1/14/03, Ben Treichel typed:
<Snip>
Yeah, 7 minutes :-(
But yours wasn't posted when I read,  yeah, that's the ticket...
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
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7) From: Ben Treichel
AlChemist John wrote:
<Snip>
Hey are you the guy who's married to Morgan Brittany?
<Snip>
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8) From: Mike McGinness
From: "Ben Treichel" 
<Snip>
handle
<Snip>
02
<Snip>
Uh, yeah. Oops on the typo. That would have been a small batch! 227gr batch.
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

9) From: Mike McGinness
From: "AlChemist John" 
<Snip>
about
<Snip>
Yeah it was a typo, make that 225gr. Finished roast weighed 196gr. Would be
a pretty good trick with a 127gr greens batch!
MM;-) aka Kona Konnaisseur miKe mcKoffee
Dual Variable Transformer Rosto Roasting
Rocky grindin' - Miss Silvia brewin'
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast


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