HomeRoast Digest


Topic: Drum Motor Idea (7 msgs / 231 lines)
1) From: Joe Screnock
As I was watching my daily bowl of Four Grain Hot Cereal circle around 
the microwave this morning, for some odd reason, I decided to count the 
RPM value.  (Turns out to be Six.)
That got me to thinking - always a dangerous prospect so early in the 
morning - "Has anyone used a Microwave Oven motor to turn a roasting drum?".
I would expect it to have enough oomph (means "torque") to turn a pound 
of beans.  Six RPM is about the same as the rotisserie motors, perhaps a 
bit faster than some.  As far as availability - I've seen many 
microwaves set out for the trash collector, just waiting for someone to 
rescue it and put it to good use.
Has anyone thought about doing this?  Has anyone tried it?
Joe
(BTW, my spell checker wants to change "oomph" to "lymphoma".  YIKES!!)
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2) From: raymanowen
The motor for a microwave carousel is a total and complete weakfish clock
motor. The Stir Crazy popcorn popper has an identical motor moving the
stirring rod.
The Stir Crazy works because it's moving a cup or less of oiled popcorn
kernels on a horizontal slick surface.
If you want a cheap, high-torque motor set up, get hold of a bread machine
at a thrift store. It has to knead a very dense, viscous dough ball to
develop the gluten for a nice bread loaf.
With a little tinkering around, you can easily vary the speed and change the
direction of rotation of this AC motor (no brushes.) It's the same type used
in ceiling fans.
Another trick to consider so you could adapt the drive motor to multiple
purposes, would be to use a variable speed electric drill to drive the drum.
Those things have gears and lots of torque. You can always find an electric
drill motor on sale, and if you get a 1/2" size, they're geared way down so
they can drill through steel with a 1/2" drill bit.
When you got more holes to drill than beans to roast, you can always unstrap
the drill from your jig, chuck up a bit and make holes.
Cheers, Mabuhay -RayO, aka Opa!
It's a wonderful thing, this multitasking...
On Wed, Feb 27, 2008 at 1:23 PM, Joe Screnock 
wrote:
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3) From: Jim De Hoog
Joe,
6 RPM is too slow for a nice even roast in a drum.  I turn my Ice bucket drum @ 60RPMs.
Jim "Ice Bucket Roaster" De Hoog
----- Original Message ----
From: Joe Screnock 
To: homeroast
Sent: Wednesday, February 27, 2008 2:23:44 PM
Subject: [Homeroast] Drum Motor Idea
As I was watching my daily bowl of Four Grain Hot Cereal circle around 
the microwave this morning, for some odd reason, I decided to count the 
RPM value.  (Turns out to be Six.)
That got me to thinking - always a dangerous prospect so early in the 
morning - "Has anyone used a Microwave Oven motor to turn a roasting drum?".
I would expect it to have enough oomph (means "torque") to turn a pound 
of beans.  Six RPM is about the same as the rotisserie motors, perhaps a 
bit faster than some.  As far as availability - I've seen many 
microwaves set out for the trash collector, just waiting for someone to 
rescue it and put it to good use.
Has anyone thought about doing this?  Has anyone tried it?
Joe
(BTW, my spell checker wants to change "oomph" to "lymphoma".  YIKES!!)
-- 
No virus was sent with this message - jjs.
Checked by AVG Free Edition. 
Version: 7.5.516 / Virus Database: 269.21.1/1300 - Release Date: 2/26/2008 7:50 PM
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4) From: Robert Joslin
Rayo
     You need some coffee.  No similes, no metaphors, no allusions to
obscure literary, chemical or engineering terms.  I understood your post on
the first read!!  :-)   Josh
On Wed, Feb 27, 2008 at 3:02 PM, Jim De Hoog  wrote:
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5) From: Joe Screnock
raymanowen wrote:
<Snip>
I'm not sure what kind of a motor our microwave has, but it can rotate 
(admittedly in the horizontal plane) a fairly heavy bowl, with liquid. 
Stoneware bowl and a couple quarts of water will be around 5 lbs. 
That's a bit more than a cup of oiled popcorn.  :-)
<Snip>
Actually, that was another idea I had.  I have an old ceiling fan motor 
sitting around (the light kit was the defective part) and have been 
giving it the evil eye...
<Snip>
I've been wanting to motorize my Zass with one of these.  Actually, I 
frequently use a drill to drive the Zass, but just on occasion, so I've 
never "adapted" anything.  I just chuck a 1/2 inch socket, thread the 
appropriate nut onto the shaft (I don't bother removing the crank handle 
but I *do* remove the shiny brass (colored) nut) and grind away.
What I'd like to do is remove the "guts" of the Zass and mount it in the 
cupboard.  Then mount a drill motor with a switch on the outside of the 
cupboard.  Simply place the container under the hole and flip the 
switch.  Perhaps someday...
<Snip>
It is indeed.
What is it, for every 10 ideas, perhaps one is workable?  I'll file this 
under one of the other nine...  Well, unless I find myself with a 
throw-away microwave that is longing to be disassembled.  ;-)
Joe
<Snip>
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6) From: Bill
Josh, I hadn't noticed it when I read Rayo's post, but you're right, I got
it all the first time through!  Wow, Rayo, a moment of weakness!!!  I'm sure
that will be corrected posthaste!bill
On Wed, Feb 27, 2008 at 2:30 PM, Robert Joslin  wrote:
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7) From: raymanowen
I recently "noticed" that I had collected six of the big microwave ovens
that can be permanently mounted under a cabinet. I had also collected,
tested and bubble wrapped more than 60 pounds of the high voltage
transformers, plus diodes and oil filled capacitors. The ring magnets of the
magnetron tubes are fun too.
I began to wonder why we're wasting so many good parts when the microwave
would have quit with the failure of just one part.  It was too late to
backtrack on the cannibalized ovens, but I started diagnosing the actual
failures on a half dozen "new junkers," plus checking my junk box, and I
found blown fuses on all but one of the big Panasonic countertop µwave
ovens.
On every other scrapped microwave, with the only exception of that one, the
fuse was blown!! EGAD, what a waste.
"I'm not sure what kind of a motor our microwave has, but it can rotate
(admittedly in the horizontal plane) a fairly heavy bowl, with liquid.
Stoneware bowl and a couple quarts of water will be around 5 lbs.
That's a bit more than a cup of oiled popcorn.  :-)"
The carousel in a microwave has very little friction, so it takes almost No
horsepower to turn it. How much exercise would you get if you rode your
bicycle in a lazy circle on a gym floor?
I just tossed out about a half dozen or more of the microwave carousel
motors. They're useless, orphaned by the digital clocks with no moving parts
or quartz movements.
Due to low friction and rolling resistance, it took only 33 horsepower to do
80 mph in the '66 XKE my thoughtful brother sold for me. I wasn't doing 80,
but the empirical driving test proved the low drag coefficient.
Back to the impossibility of tumbling coffee beans in a roasting drum with a
wimpy microwave carousel motor: It is. The powerful drill motor is the way
to go, and least expensive. The microwave carousel motor is synchronous.
It's either stalled and reverses or it runs at the synchronous speed only.
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Wed, Feb 27, 2008 at 2:46 PM, Joe Screnock 
wrote:
<Snip>
ee.com
<Snip>
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