HomeRoast Digest


Topic: IR2 Problems (10 msgs / 276 lines)
1) From: Larry Williams
It's been almost 2 years of weekly roasting, and I believe the IR2's days are numbered.  What do you think?  For the last month or so, at the end of the cooling cycle there is bearing squeak noise just as it stops.  And on the last two periods of roasting when I first start the roast the fan motor is slow to start - like there is a drag on the bearing.  Like this morning it only happened on the first roast.  But the cooling motor squeak happened on all of the 6 roasts.  Time to dust off the credit card?
For those of you that wonder " 6 roasts?"  I cool the motor with my Jennair vent fan for 10 minutes minimum between roasts.  The unit appears to be cool.
Larry
Every day is a Saturday - almost!
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2) From: Jim Couch
It's possible that your cooling procedure is "drying" up the
works........may just need to put it "on the rack" and do a lube job, but,
Don't even begin to know if that is a practicality. That could be saying the
same thing as........Time to dust off the credit card. I vaguely remember
reading somewhere that 2 years is considered a "normal" lifespan for a home
roaster.
On Sun, Dec 14, 2008 at 12:17 PM, Larry Williams wrote:
<Snip>
-- 
111,111,111 x 111,111,111 = 12,345,678,987,654,321
"This is worse than a divorce... I've lost half of my net worth and I still
have my wife.."
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3) From: MSMB
I have been using my IR 1 for about two years (bought it used, but probably
not used much) and am getting the same problem squeak at the end.  I do not
seem to have the delay problem at the beginning; actually, might have had it
on occasion but but figured it just wqas a normal part of the mechanics of
the machine; sometimes it started that way sometimes it did not.  I have
done a lot more than a weekly rost and have made up to around 5 pounds of
roasted coffee over about a 2 week period, doing several roasts per day,
sometimes with only about 1/2 hour of cooling time between them. I continue
to be impressed with the device. And will use it until it just does not do
that job anymore.
But on the other hand, now that I have a new propane grill outside, how do
you control the temperature on a BBQ roaster?

4) From: miKe mcKoffee
Sounds like fan motor bearing going out. 
miKe 
<Snip>
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5) From: Mike Sieweke
It's not a bearing - just a bushing.  I have the same problem
with my iR1, and I have to open it up and lubricate it every
8 roasts or so.  When the bushing is in need of lubrication,
it slows the fan enough to raise the roast temperature and
speed up the roast.
There are two bushings.  One can be reached from below
after removing the fan/motor assembly from the case.  The
other bushing is under the impeller.  You have to remove 8
screws that seal the blower housing, and then unscrew the
impeller to get to the bushing.
They really ought to be lubricated with a food-safe oil.  I've
used 3-in-1 oil and electric shaver oil, neither of which is
food-safe.  Mineral oil is sold at drug stores, and that's
probably a safer option.
I hope it holds out long enough for me to decide on a
replacement.  The Behmor is looking pretty good right now.
Mike
On Dec 14, 2008, at 3:59 PM, miKe mcKoffee wrote:
<Snip>
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6) From: raymanowen
I can only say this because I don't have the problem myself, but the high
rpm series wound motors usually have phosphor-bronze bearings, same bearings
in small shaded-pole induction motors used on blowers. There is a
lubrication wick on each of the bearings, but the motors are known as
"permanently lubricated".
If any motor can be mounted in more than one orientation, the actual build
will always have them mounted in an impossible-to-lubricate orientation,
Guaronteed!
You don't need a new motor, just take it apart, clean the bearings, motor
shaft and lubrication wicks. Soak the wicks and put a couple of drops of
Silicone based oil the bearing surfaces as you reassemble the motors and the
roaster.
If it uses a "muffin" fan, it has a single, long bearing in the hub. Oil is
applied via a hypodermic syringe through a rubber dot at the center of the
motor opposite the fan rotor.
A couple of drops of oil will extend the life at least another 50%, if the
bearings and shafts aren't completely worn out already.
There are lubrication points- it's just another one of those things missing
from the instruction manual. Asinine design makes one think mediocre service
is great.
I used to have this grinder with comical burrs...
Cheers, Mabuhay and Magandang Gabi -RayO, aka Opa!
On Sun, Dec 14, 2008 at 11:17 AM, Larry Williams wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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7) From: Larry Williams
I plugged in the IR2 this morning and hit the roast button for a quick test.  The motor barely started.  I will take the unit apart and lube the bearings or bushings and test it.  If it works, I will put it on the shelf as a back-up.  
Just ordered a new one from SM w/ the 8 lb sampler, and 25 bags for gift coffee.  I have considered a different roaster - either a Gene Cafe or Hot top, but I am so comfortable with the IR2, I decided not to change.
Thanks for the input and suggestions.   I'll let you know how it goes.  May take pictures.
Merry Christmas
Larry
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8) From: sci
My IR2 sports a big decal on the back of the unit stating that one should
not roast more than 7 times per week.  Hearthware knows something about the
units we don't. I try to baby mine, hoping it'll last longer. It sure is a
very convenient, nearly fire-and-forget roaster.
Only occasionally do I roast more than one batch a day in the IR2. Usually,
I try to use a different roasting method for a second roast. It never hurts
to have "backup" or secondary methods for things as mission critical to life
as fresh roasted coffee!
If you did the amount of roasting you indicated with lots of back to back
roasts, and the unit lasted 2 years, I'd say you got your money's worth out
of it.
Ivan
"Coffee Animal"
++++++++++++++++++++++++++++++++++
Date: Sun, 14 Dec 2008 12:39:01 -0600
From: "Jim Couch" 
Subject: Re: [Homeroast] IR2 Problems
To: homeroast
Message-ID:
       
Content-Type: text/plain; charsetO-8859-1
It's possible that your cooling procedure is "drying" up the
works........may just need to put it "on the rack" and do a lube job, but,
Don't even begin to know if that is a practicality. That could be saying the
same thing as........Time to dust off the credit card. I vaguely remember
reading somewhere that 2 years is considered a "normal" lifespan for a home
roaster.
On Sun, Dec 14, 2008 at 12:17 PM, Larry Williams 

9) From: Allon Stern
On Dec 14, 2008, at 10:17 AM, Larry Williams wrote:
<Snip>
I took apart a junker; I cleaned up LOTS of crap from all over the  
insides; the fan is probably all crudded up. The motor comes apart  
easily enough; there are bearings on front & back which could  
probably be cleaned and do with a spot of oil. The brushes are a pain  
to get back in, though.
Picture (from before cleanup) here:http://www.radioactive.org/iRoast2%20Teardown/Photos_files/DSC_0078.jpg-
allon
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10) From: John B. Webster
I used an IR2 for almost two years.  The motor seemed Ok and still does, but 
the top plastic lid cracked and the screen deteriorated.  I did buy the 
replacement parts($40.00), but went with a Gene Cafe as well.  I still use 
the IR2 but obviously not as frequently.  I think the cracking came from 
overuse--either not letting it cool properly or with too much use the 
plastic got brittle. I suggest that anyone that roasts more than 2-3 # per 
week have a spare lid ---or another roaster--- around a backup.
John


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