HomeRoast Digest


Topic: Pro 1500 Roaster (17 msgs / 350 lines)
1) From: Tom & Maria
Hey all,
I have one of these $6000 Pro 1500 roasters from imex/caffe rosto 
this week. Really amazing machine, just way to much $$$ !
I just wish you all could check this thing out. With all the hottop 
discussion, and dialogue about desireable features on an ideal "high 
end" home roaster, this machine has so many features that would be 
incredible to incorporate into a more affordable machine. Anyway, I 
have a couple pictures and a few comments on the web page.http://sweetmarias.com/prod.cafferostoPRO1500.shtmlTom
--
                   "Great coffee comes from tiny roasters"
            Sweet Maria's Home Coffee Roasting  -  Tom & Maria
		1455 64th Street Emeryville CA 94608
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2) From: Charlie Herlihy
--- Tom & Maria  wrote:
<Snip>
 Hey John C.-you definately NEED one of these. You still have
that stocking mask, right? ;o)  The 20-25 minute roasts are just
like my brick oven's. Bound to make a very smooth brew. I'm
suprised that the heat source is a halogen light(?)
Charlie
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3) From: Les & Becky
WOW what a dream machine!!!
Maybe some of you roasters that live close together could form a roasting
coop, and share a deam machine!
Les

4) From: Steven Van Dyke
Very interesting - especially that bit about 'halogen heat source'.  Can you
give some more details for the list's mad scientist brigade?
Enjoy!
Steve :->
http://www.svandyke.com<- my simple home page
http://www.cafeshops.com/stevespics<- my little store of Impressionist &
Special Events Photography stuff)

5) From: Mike McGinness
From: "Les & Becky" 
<Snip>
I'll offer my garage to setup and store the Pro 1500 and will put up the
first $1000 towards it's purchase. Now just need to find 5 other local crazy
home roasters!:-)
MM;-)
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
Leaving for Kona Festival in 9 days!
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6) From: Dan Bollinger
Steven,  I think they are using the same heater rods used in many toaster
ovens.  Not positive, but likely.  Dan

7) From: dewardh
Mike:
<Snip>
first $1000 towards it's purchase. Now just need to find 5 other local crazy
home roasters!:-)
You're probably one of the few here who consumes enough coffee to justify it 
.  I got a chance to look one over early this year (when my first CR didn't 
seem to be working right . . . Steve used the 1500 to verify line voltage (one 
heck of a voltmeter )).  It is indeed a fabulous machine . . . but . . . 
unless they've made subsequent mods it really can't roast less than a pound. 
 Among other "small batch" problems the bean temperature sensor (on the model I 
saw) was located high enough in the roast chamber that with only a pound of 
beans in the chamber it was hanging in free air until after the expansion from 
"first crack" (although perhaps they've fixed that for "production").
Even more important than the $$$, a pound of beans (or two, or three, if you 
blend "post roast") represents a lot of coffee for a "home" to drink every 
week.  It would certainly preclude keeping several varieties, fresh roasted, on 
hand . . . for most of us, anyway.  The same degree of "automation" (and the 
excellent exhaust scrubber) would be great on a quarter-to-third pound machine 
(half to maybe one pound max) but reducing the size of the roast chamber might 
drop a whole $50-100 off the price .  A guaranteed market of five or ten 
thousand units might get the price below (or at least into the low) four 
figures, though . . . should we start a list ? ? ? 
Deward
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8) From: Dan Bollinger
Just did some reseach. These are sometimes called 'ceramic far-infrared
halogen heaters'.  Here's a product that uses them:http://www.trade-post.com/halogen-heater/<Snip>
&
<Snip>
<Snip>
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9) From: Tom & Maria
Unimax was the first to use halogen heat bulbs as far as I know. They 
need to be replaced every few years, but here's a case where you can 
roast up to 3.3 lbs. on 110 v electrical -something I would consider 
impossible otherwise. Can't tell you much more about the bulbs or 
using halogen for heat, but I am sure that one of the techies on the 
list knows something about it. Just like the Unimax they use 2 
parallel overhead bulbs.
<Snip>
--
                   "Great coffee comes from tiny roasters"
            Sweet Maria's Home Coffee Roasting  -  Tom & Maria
		1455 64th Street Emeryville CA 94608
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10) From: Tom & Maria
Basically, if anyone is in the area I think I only have the machine 
for today and part of tomorrow. Come by and roast a 2 lb batch!
Tom
<Snip>
--
                   "Great coffee comes from tiny roasters"
            Sweet Maria's Home Coffee Roasting  -  Tom & Maria
		1455 64th Street Emeryville CA 94608
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11) From: Rick Farris
Tom wrote:
<Snip>
Tom, the lower end Diedrichs that advertise being IR roasters -- Do they use
these halogen sources?
-- Rick
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12) From: Andrew J. Lynn
I did some research on this in building tech classes in college, 
designing with light bulbs doubling as electric heaters.  (Incandescent 
bulbs put out higher quality light than fluorescent but normally their 
high energy use can't be justified when energy efficiency is a major 
concern.)  Here's my understanding:
Light bulb filaments are basically heating elements - very thin ones 
mounted in a bulb of a gas that suppresses burning and oxidation.  The 
heat produced by a filament bulb is equal to its power consumption - 
60W, 75W, etc.  Halogen is an excellent gas for this, so it's easy to 
get consumer-grade halogen bulbs to put out 500W.  The light is a 
byproduct of the heat - hot filament glows.
If my understanding is correct, light bulbs are good as heating elements 
because it's easier to make a light bulb to a very tight spec in terms 
of heat generation.  Heat generation is controlled by the resistance of 
the heating element, which the nature of a light bulb lets you control 
more easily - it's a closed environment where you know what gas you're 
working with, you don't have to worry about corrosion which is a problem 
in high-energy situations when oxygen and moisture are present and you 
can set the initial resistance by varying the length of the filament.
Add to that that it's cheap to make a halogen bulb, efficiency can be 
improved if you don't have to worry about putting out high-quality light 
(you can use different materials), and it's cheap and easy to replace 
the heating elements when they're light bulbs.
Andy Lynn
Tom & Maria wrote:
<Snip>
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13) From: Dan Bollinger
Andy, The Pro 1500 Roaster boasts an afterburner feature to reduce smoke and
eliminate venting.  I wonder if this isn't accomplished by passing the
exhaust gas pass the very hot halogen bulbs?  Any ideas?  Dan
<Snip>
<Snip>
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14) From: TFisher511
I am probably the only one left using my original Unimax2000. I unboxed it a=
 
couple months ago and have been using it as my primary roaster ever since. I=
t 
is quiet, I mean really quiet. It roasts 7 ounces to the virge of second 
crack in about 10:30 to 11:00 minutes.
The heating tubes are mounted directly under a fine screen that keeps the 
roasting smoke very well under control until it goes into the cooling cycle.=
 
When the cooling fan turns on, the smoke finally rolls out of the roaster. I=
t 
ejects the beans after another 10+ minute cool down in 85 F weather when =
the 
beans reach 121F according to what the Unimax designer told me. The catch=
 
basket is a metal mesh container that sets inside a Mr. Coffee type filter 
basket. It is a very affective way to separate the chaff from the beans.
With the heating tubes mounted at the top of the roaster, the motor, circuit=
 
card assembly and controls are shielded from the heat which should increase 
the reliability of the unit. Add the fact that there is virtually no 
vibration and I understand why mine still works like new after about five 
years of off an on use.
There were some problems that could have been easily resolved if Royalmax ha=
d 
decided to keep the U2000 in their lineup after they took over Unimax. They 
chose to dump it instead so a basically good roaster is now history. 
I'm just glad Swissmar and soon Hearthware are picking up the 1/2 pound 
roasting capacity for the little guys and gals like us.
Terry F
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15) From: Andrew J. Lynn
Dan, I can't say I know that. :)  I'm new to this and don't know how 
afterburners work, outside the usual context of jet engines.
Andy Lynn
Dan Bollinger wrote:
<Snip>
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16) From: Ben Treichel
Hey Tom,
As the grandparent of our "roasterdesign" techie 
roast controller design list, how about signing on over there and 
telling us about "this machine has so many features that would be 
incredible to incorporate into a more affordable machine". It would be 
great input for our design features list.
Our goal is to put smart controls on the 3oz to 2lb roasters that exist 
or are being specially built.
Ben
Tom & Maria wrote:
<Snip>
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17) From: Steven Van Dyke
Dan,
Very interesting - hadn't even thought about those, or the 'invisible'
stove-top units.  Until your message I never made the connection between
those 'quartz heating elements' and 'quartz-halogen lights'.
Enjoy!
Steve :->
http://www.svandyke.com<- my simple home page
http://www.cafeshops.com/stevespics<- my little store of Impressionist &
Special Events Photography stuff)


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