HomeRoast Digest


Topic: Subject: Subject: Re +Alpenrost (73 lines)
1) From: Craig Andrews
Hi Tom,
I answered this question for Bob Trancho on the Homeroast list, it's in
the digest version, Vol 1 #1080 45 messages, Message:45. Subject: +Alp
adjustments/cleaning?
I c,c,& pasted a few of my answers to his question  below...
I gave detailed instructions on how to adjust the roast time frame
window on an Alp, (even without a volt/ohm meter), but you are some what
limited without one!  Before you start, do you have a multi-meter?
(volt-ohm meter), you can't properly adjust the roaster without one, &
do you have the earlier Version 1.0, or the newer model, Version 1.1?
1.1 has a white sticker on the bottom of the roaster.  To open up the
Alp, lay the Alp down on it's back, hinges on the table. You'll need a
security torx bit(T-10) to take the panel off to access the printed
circuit board. Also needed is a 5/32" hex key to adjust Vr1(variable
resistor, potentiometer). Vr1 is the 2nd hole, center right hand side of
the board. The Vr is 1000 ohm,*DO NOT PLUG IN*, take a resistance
measurement from the center terminal point & the bottom point on the PCB
printed circuit board.Lower resistance, higher current to the heater P=E
x I  (P=E squared divided by R, resistance). On my Alp resistance is
578ohms, they're different because of manufacturing tolerances/variables
in electronic components, heating elements,etc.
The potentiometer Vr1 adjusts through an arc of about 270 degrees, 0
ohms to 1000 ohms. You'll be adjusting counterclockwise & the pot is
very sensitive to adjustments, so you'll have to make SMALL adjustments,
like the #'s on a clock face. When the hex key is in the pot hole,
wherever the key is pointing to (example 10.00am), move the key
counterclockwise, to 9.00am, assemble the Alp & test the roast time with
a test roast. That's the best you'll be able to do without a
multimeter,borrow one or buy one, they can be fairly cheap, & this way
you won't waste green by making unknown adjustments. You may get lucky &
hit it spot on with the procedure I've just described though!  {:-D
Roast time frame window start & end times, #'s 1-15, starts at 16.25mins
& increases incredimentally every 15 secs per #, to 19.55mins. Get a
timer/stopwatch & time a roast. Adjust the roast window to the middle of
the roast time frame window, #8 approx 18.10mins for start 2nd crack. I
adjust the roast time frame setting at approximately the middle of this
window, #8 (18.10mins), for the start of 2nd crack. One unit I was
working on,1st crack was at 10.45 mins & 2nd at 13.00 mins, a 28%
shorter roast cycle. I had no scorching or tipping of the control bean
I'm using, Swissmar's Columbian Estate (not estate by the way!!) This
machine was roasting very hot & was adjusted accordingly to the proper
time frame roast window (#8).  I'm doing repair & service refurbishing
work for (Canada) Swissmar (Swissmar Imports Ltd) 35 East Beaver Creek
Rd., Unit 6  Richmond Hill, Ontario, Canada L4B1B3 1-(905)-764-1121.
The(USA) Swissmar Imports Inc  6391 Walmore Road Niagara Falls, NY.
14304 1-87-SWISSMAR (1-877-947-7627) warehouse is where all the US
roasters are shipped to for warranty work/replacement. All the roasters
are then shipped to the Canadian address. Believe you/me, there's enough
of them! Heat is regulated by a thermocouple attached to the heating
element, proper adjustment of potentiometer/variable resistor (Vr1),& by
the ambient air temperature correction sensor on Ver 1.1. The
thermocouple is spotwelded to the left front heating element, under the
stainless retaining clamp & has no bearing on being defective, or gunked
up with dust/chaff/goo and limiting the roast somehow. The heating
element,if viewed in a darked room, will *GLOW* orange & all particulate
matter is burned off. The thermal fuse & thermostat are also not
affected by particulate matter.You say you keep it clean, is the
stainless reflector on the lid, inside the roast chamber clean & shiny?
The Alp relys on & needs these reflective surfaces to help it roast
evenly & consistently. The Alp is also weight sensitive..., are you
weighing 8oz roasts to 225-227 grams? Cheers!
Regards,
Craig Andrews.
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