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Topic: Rosto thermostatically controlled >was Re: +variac....Mike (11 msgs / 236 lines)
1) From: Mike McGinness
From: "Rick Farris" 
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of
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Rick,
You're entirely correct. The importer, Brightway, does say it in their web
fact sheet:http://www.imex-hcc.com/My experience says it's brainless, not "thermostatically controlled">http://www.brightway.com/specs.htmlHowever, the manufacturer, Imex, does not mention that from what I can find:http://www.imex-hcc.com/My experience says it's brainless, not "thermostatically controlled
temperature" regardless what their marketing says. I believe their technical
ad writers may also be brainless:-)
When I first got my variac I emulated a FR roast. Roasted a batch to dark
oily rolling heavy smoke 2nd crack French in just over 4min with voltage up
around 130v. I've also done light City roast drum emulation in 20min -
voltage down around 105v. Doesn't act thermostatically controlled to me!
Maybe both of my Caffe' Rostos are thermostatically defective:-) If a defect
it's a defect I welcome BTW.
MM;-) aka Kona Krazy miKe mcKoffee
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
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2) From: Ben Treichel
Mike McGinness wrote:
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Or stretching the truth (depends on the meaning of "is"). I guessing it 
has a thermal limit like the hot air poppers or my FR, so they are 
making the thermal control claim.
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3) From: Mike McGinness
Replying to my own post...
From: "Mike McGinness" 
To: 
Sent: Friday, December 20, 2002 7:33 AM
Subject: Rosto thermostatically controlled >was Re: +variac....Mike
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find:
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Did some more reading on Imex sit. The Korean mfg. does state something
similar too:
"The heater applied by thermostat and timer produced delicately in Europe
and made by the experienced technology producing four million popcorn
poppers generates safe and accurate heat, and roasts green beans at most
suitable condition. It is IMEX's know-how that the coffee roaster gets to be
smokeless during operating and keeps flavor and aroma of coffee at best."
end cut&paste quote
It's not smokeless either!!!
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technical
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up
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defect
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4) From: Rick Farris
Mike wrote:
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I'm going with your experience, Mike.  Now if I could only get my hands on
one.  I just checked with UPS and my Alpenrost is "Out for delivery!"
-- Rick
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5) From: John Abbott
I hope the UPS driver sees Rick standing in the road as he waits!!

6) From: Mike McGinness
From: "Tom Gramila" 
 And I would guess that "really hot"  is way hotter than I
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And not cutting out "really hot" since it didn't cut heat when I fed 130v+
emulating FR French roast in 4min!
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I will be when I get around to separating the fan from the timer so I can
control heat and fan independently...
MM;-) aka Kona Krazy miKe mcKoffee
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
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7) From: Tom Gramila
On Fri, 20 Dec 2002, Mike McGinness wrote:
<Snip>
	So could this mean that it has the same sort of thermostat as
popcorn poppers:  which essentially prevent the heater from reaching
"thermal runaway"??  That sort of thermostat would not interfere at all
with variac control, since its doesnt do anything other than conduct until
the temperature gets really hot.  
	And I would guess that "really hot"  is way hotter than I
understand that you use in your profile, since your 10+ minute profile
must use much lower temperatures than the much more rapid
non-rockin-variac'in approach...
	Has anyone looked in the guts of the thing??
	Tom G.
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8) From: sho2go
I've had problems with my Rosto not getting hot enough. Scott said it was
probably the thermostat........
Mike

9) From: dewardh
Mike, Rick:
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temperature" regardless what their marketing says.
I just opened up one of my Rostos, and on the heater board found a 
"thermostat".  There is also a "thermal fuse" (which is not resetable, better 
hope you don't blow it).  And . . . I have in front of me right now a 
replacement heater element, and it has in it, in addition to the "fuse", a 
small "thermally controlled" switch.  That said . . . I, like Mike, have never 
observed the device "working" during a roast.
Maybe they refer to the effect of the small chaff filter.  I've noted before 
that as the chaff filter plugs up (which it will do, to some extent, with most 
beans . . . it's too small) it reduces air flow, and so the internal 
temperature rises.  Perhaps they meant to claim "chaffostatically controlled" 
but the copy writers found that too clumsy . . . .
Deward
Ps.  to open a Rosto you will need a T10 (Torx) screwdriver . . . (and some 
samples require it to be hollow tip . . . it's easy to see if you need one of 
those just by looking, it's needed if there is a round "plug" in the middle of 
the screw head.  The roast chamber comes off (exposing the heater) by removing 
two Torx and one Phillips head screws in the bottom of the roast chamber . . .)
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10) From: Randy Roy

11) From: David Lewis
At 7:33 AM -0800 12/20/02, Mike McGinness wrote:
<Snip>
I can see where they got the idea from this quote off the Imex site:
"The heater applied by thermostat and timer produced delicately in 
Europe and made by the experienced technology producing four million 
popcorn poppers generates safe and accurate heat, and roasts green 
beans at most suitable condition. It is IMEX's know-how that the 
coffee roaster gets to be smokeless during operating and keeps flavor 
and aroma of coffee at best."
Maybe the thermostat and timer are produced a little *too* delicately 
in Europe!
Best,
	David
-- 
"To announce that there must be no criticism of the President, or 
that we are to stand by the President right or wrong, is not only 
unpatriotic and servile, but is morally treasonable to the American 
public."
     -- Theodore Roosevelt
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