HomeRoast Digest


Topic: Roaster woes... (17 msgs / 390 lines)
1) From: Starfinder Stanley
Well, my alpenrost done bit the dust, after acting purty weird during the
last 4 roasts....  Most of the way through yesterday's roast, just blinked
out, no power, no nothin'.... fortunately I was able to rescue the beans,
had to sort out and toss about 1/8 of the batch that burned when the drum
stopped rotating, but the rest ended up just about right.
So now I get to do a bit of frankenrosting....  Has anybody out there
chopped up an old alpenrost?  Or even better, chopped one up and has a
(virtual) stack of pics of the disassembly and diagrams as to which bit is
which?  I was impressed by the detailed depictions of the decon of the
iRoast, so I figure I should ask before I forge my own trail into deepest
darkest Alpenrost....
My Behmor days may be closer at hand than I thought.
...Starfinder
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2) From: Ryan M. Ward
My condolences...
Do you know which component failed?
-- 
Ryan M. Ward
*Note: This email was sent from a computer running Ubuntu Linux 9.10 (Karmic Koala)http://www.ubuntu.com**Note: This signature was placed here by me and is not automatically-generated-annoying-end-of-email-spam placed here by anyone other than myself. I am a Linux nut and am doing my part to support open source software and the Linux and Ubuntu communities by getting the word out with each email I send, I encourage you to do the same.
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3) From: Starfinder Stanley
Total loss of power.  Acts like it isn't plugged in.  I'm going to go out on
a limb and say that I think it's one of the electrical components, but
beyond that it's anyone's guess.  Haven't started dismantling it yet; got
too much on my plate already this weekend.....
On Sat, Jan 30, 2010 at 8:54 PM, Ryan M. Ward
wrote:
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4) From: Mike Chester
At first glance, it sounds like it blew the thermal fuse.  This is a safety 
device that will blow to prevent it from overheating to the point of 
starting a fire.  It can be replaced relatively cheaply if you have some 
basic skills with electrical components.  This is just a SWAG, however.
Mike Chester
--------------------------------------------------
From: "Starfinder Stanley" 
Sent: Sunday, January 31, 2010 12:18 AM
To: 
Subject: Re: [Homeroast] Roaster woes...
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5) From: Ryan M. Ward
I caught myself wondering if it was a transformer. I will admit; however, that I am not expert on circuitry. My knowlege is limited to two courses in college(and one of those courses was on digital circuits, probably not much help here). If it is the transformer, these can be relatively cheap as well. Personally, I would look into Mike's idea first though.
-- 
Ryan M. Ward
*Note: This email was sent from a computer running Ubuntu Linux 9.10 (Karmic Koala)http://www.ubuntu.com**Note: This signature was placed here by me and is not automatically-generated-annoying-end-of-email-spam placed here by anyone other than myself. I am a Linux nut and am doing my part to support open source software and the Linux and Ubuntu communities by getting the word out with each email I send, I encourage you to do the same.
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6) From: Yakster
You should be able to test both the thermal protection device and the
transformer with an ohm meter (or regular digital volt meter set to measure
resistance).
Make sure that there's no voltage applied and allow time for any circuits to
bleed off and look for low resistance across the thermal protection device
and low resistance (a couple of ohms) across the two primary leads on the
transformer and across the two secondary leads of the transformer.
My money is on the thermal protector.
-Chris
On Sun, Jan 31, 2010 at 2:29 PM, Ryan M. Ward
wrote:
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7) From: Michael Dhabolt
There was a thread several years ago on one of the coffee related
forums about troubleshooting problems with the Alp.  I think it was on
coffeegeek.com.  You might try searching for Alpenroast on the various
forums. I believe the thermal protection was identified as the most
common problem resulting in the type of problems you are seeing (as
has already been identified by others in this thread).  Disassembly
and troubleshooting instructions in the thread were comprehensive and
would be worthwhile if you can find them.
Thorough cleaning (requiring a certain amount of disassembly) and
replacing a part or two is probably required.
A good place to start searching for info would be:http://coffeegeek.com/forums/coffee/homeroast/41480#41480One of the contributors to the thread is a guy with the handle CraigA
(I believe).  He was a maintenance/repair guy who did work for
Alpenroast when they were a popular item.  If you follow all the links
in the above thread you should run into all the info available on the
Alp.
Good Luck
Mike (just plain)
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8) From: Starfinder Stanley
Yes, I did see those in my googlings....  Most of the links through tinyurl
seem broken, but I'll try emailing craig.  I'll see if I can find time to
crack 'er open before next week...   And in the meanwhile, I think I had
another creaky but still functional alpenrost stashed away as a
summer-festival nut roaster, which will hopefully keep me in roasted beans
until I get the other one working again.  Elsewise I'll have to resurrect
the scirocco....
On Mon, Feb 1, 2010 at 11:50 AM, Michael Dhabolt
wrote:
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9) From: Starfinder Stanley
Mike was right; it was the thermal fuse....  Popped down to radio shack and
bought a new one (trying not to think about the fact that everything I've
ever purchased at RS has failed), popped it in, reassembled, and viola! it
works!
Now all I have to do is figure out where these 4 extra screws came
from.....  
The perils of a trip to the store in the middle of the decon/recon process.
Sigh....
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10) From: Ryan M. Ward
Congratulations on your success,
If you want to avoid Radio Shack in the future check out:http://www.jameco.com/Although I imagine the part you bought was cheap and not worth the effort of ordering it.
-- 
Ryan M. Ward
*Note: This email was sent from a computer running Ubuntu Linux 9.10 (Karmic Koala)http://www.ubuntu.com**Note: This signature was placed here by me and is not automatically-generated-annoying-end-of-email-spam placed here by anyone other than myself. I am a Linux nut and am doing my part to support open source software and the Linux and Ubuntu communities by getting the word out with each email I send, I encourage you to do the same.
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11) From: Starfinder Stanley
I'll check out the jameco site.  RS gave me instant gratification ---though
the only reason I knew they had the part was via the internet (an electrical
engineer friend I was chatting with about the fuse looked it up for me), and
when I got there they insisted they didn't have it ---until I found it and
showed it to them.  Ah, the customer service!  Then I got so excited that I
forgot to check the area for errant screws....  Well, at least with a set of
4 I think I might remember what it was I forgot to reconstruct (at first it
was 2, which was confusing, then it was 3, which made me downright
uncomfortable, and ultimately the 4th appeared -phew!- which makes a lot
more sense than 3!); I just have to find the time to take the poor thing
apart again now!
Fortunately, this sort of thing never happens to me with animals, I swear!
I never have any unaccounted-for miscellaneous parts lying around after I
put them together (yeah... "hmm, wonder where the heck that was supposed to
go?")
On Wed, Feb 3, 2010 at 12:13 AM, Ryan M. Ward
wrote:
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12) From: miKe mcKoffee
Just don't ever disassemble reassemble more than one animal at a time:-)
Then again, the results could be most interesting!
Slave to the Bean Kona Konnaisseur miKe mcKoffeehttp://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must">http://www.NorwestCoffee.comURL to Rosto mods, FrankenFormer, some recipes etc:http://www.mckoffee.com/Ultimately the quest for Koffee Nirvana is a solitary path. To know I must
first not know. And in knowing know I know not. Each Personal enlightenment
found exploring the many divergent foot steps of Those who have gone before.
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13) From: raymanowen
I have the replacement for your blown Fth, eschew RS. Rated at 800 and 13
Amperes, this really is a thermal fuse- just recalibrated a few degrees and
a few amps from the one that blew. Right, the RS replacement will blow
unless you quit using it.
Normal fuses run at over half their full rated load current in a
non ventilated enclosure will get hot and melt open. You really shouldn't
operate high temperature or high power devices unless you can devote 100%
attention.
Operate a thermal fuse near its full rated load inside a hot roaster, and
you will expose yourself to some Neanderthal design that imposes an
arbitrary limit on your roasting enjoyment. I think "Home roasting" means
Don't Run It More Than 5% of the time with a full bean load.
Just on general principles, the thermal fuse should be the first thing you
recalibrate before you start using a new piece of equipment. Heat guns are
supposed to get hot, but Master is the only one I've seen that doesn't have
an Fth.
Cheers, Mabuhay, Iechyd -RayO, aka Opa!
Remember the 100% attention duty cycle.
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14) From: Starfinder Stanley
How do I get it?  I was momentarily tempted to install the 222C fuse, or
even better to just jump the fuse and be done with it, but I thought
that imprudent.  I'm sure that the RS fuse will croak quickly
---actually figured I'd get the chance to replace the 4 errant screws when I
have to disassemble it to re-replace the fuse.  I also thought briefly about
simply cutting a bunch of ventilation holes into that area of the chassis,
since it undoubtedly heats up a lot in the unventilated enclosure!  Anybody
out there tried that?
On Wed, Feb 3, 2010 at 11:26 AM,  wrote:
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15) From: Allon Stern
Hm, this never seemed to hit the list; trying again....
On Feb 3, 2010, at 12:13 AM, Ryan M. Ward wrote:
<Snip>
Orhttp://www.digikey.com/For fun surplus parts some of which may be adaptable into roasting projects,http://www.mpja.com/http://www.allelectronics.com/http://www.sciplus.com/For fun logic bits for controllers, tryhttp://www.sparkfun.com/http://www.adafruit.com/http://www.futurlec.com/AND for fun coffee roaster hackshttp://hackaday.com/?s=coffee+roaster-">http://www.newark.com/Orhttp://www.digikey.com/For fun surplus parts some of which may be adaptable into roasting projects,http://www.mpja.com/http://www.allelectronics.com/http://www.sciplus.com/For fun logic bits for controllers, tryhttp://www.sparkfun.com/http://www.adafruit.com/http://www.futurlec.com/AND for fun coffee roaster hackshttp://hackaday.com/?s=coffee+roaster-
allon
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16) From: peterz
I replaced my fuse with 10 gauge wire :)
PeterZ
who never leaves his roasting unattended, here in LHC
raymanowen wrote:
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08:09:00
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17) From: Ryan M. Ward
oooooohhhh... thanks for posting this. The gears in my evil little mind are turning...
-- 
Ryan M. Ward
*Note: This email was sent from a computer running Ubuntu Linux 9.10 (Karmic Koala)http://www.ubuntu.com**Note: This signature was placed here by me and is not automatically-generated-annoying-end-of-email-spam placed here by anyone other than myself. I am a Linux nut and am doing my part to support open source software and the Linux and Ubuntu communities by getting the word out with each email I send, I encourage you to do the same.
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