HomeRoast Digest


Topic: rotisserie motor speeds (19 msgs / 524 lines)
1) From: Jim Brockman
This is a multi-part message in MIME format.
I am using a BBQ grill with the Frontgate stainless drum with good =
success.  My rotisserie motor (Weber) turns the drum at 3 rpm but with =
the addition of 1.5" fins the unit works well.  I'd like to speed up the =
rotation speed.  The Charbroil motor will turn at 5-6 rpm.  Any =
suggestions of other motors that will fit?
Jim Brockman in Orlando
Silvia/Super Jolly

2) From: Dan Bollinger
This is a multi-part message in MIME format.
You can get faster motors at Graingers.  Look for synchronous gear =
motors.  Dan

3) From: AlChemist John
Sometime around 10:27 11/27/02, Jim Brockman typed:
<Snip>
I have found many inexpensive motors in to 20 - 60 rpm range with 
sufficient torque (again at C&H supply).  My main problem so far is finding 
couplings that will work.  That square insert that rotisserie motors have 
seems to be rare.
BTW, Jim, very nice piece of work on your drum.  Are those still 
available?  I could not find them at Frontgate.  Do you know what gauge it is?
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

4) From: Ed Needham
I emailed Frontgate, and they said it was not offered by them anymore.  I
tried to find out who they bought them from, but they were tight-lipped, only
saying it was an Italian company (heheheh---Isn't that fitting for a
roaster?).
Ed Needhamhttp://www.homeroaster.comed
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5) From: Jim Brockman
Ed, AlChemist John  and others:
I am determined to perfect the drum roaster. It is so simple
to make and operate but the major drawback I'm finding is
that I keep getting a little too much "spread". I get about
a "10%" spread of color on the finish.  I think I get a  few
too many underroasted laggard beans producing a "calico"
roast..  After consulting with Fred Langer, we discovered
the Weber runs at 3 rpm and Ed quoted 6 rpm on the Charbroil
series and feel the slow rpm is not a good thing.
I have a little experience running a San Franciscan 25#
commercial roaster and am trying to mimic the roast profile.
The SF unit runs at least 30-40 rpm? Very fast.
So, last night I snagged a used Charbroil 6 rpm motor and
will try Sunday evening with 2x the rpm speed.
I use primarily SM Monkey and Moka Kadir and would like to
perfect that pre- blend profile before moving to more exotic
beans.  Yes, single beans do roast more evenly on the BBQ
roaster.  And no, I cant find the Frontgate drums any more.
I'm having a local stainless steel shop quote me a price for
a few units handmade.
Thanks everyone for the great support.
Jim Brockman in Floridahttp://lists.sweetmarias.com/mailman/listinfo/homeroast">http://www.homeroaster.com/brockman.htmlhomeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

6) From: Ed Needham
I hope you're sitting down when the machine shop gives you the quote.  I get
stainless parts fabricated once in a while when I can't make them myself, and
I am ALWAYS taken back by the price.  For a 12" x 6" diameter cylinder, I
would bet you'll end up paying $30-$40 for the perfed stainless, $30 to $40
more for them to cut it to size, and $30 to $40 for the weld where they join.
Total will be near $150 per drum, and you'll only have the cylinder.  You'll
still have to rig up the end pieces and the connection to the BBQ rotisserie
spit.
That's why some of us were searching the net for ready made parts that cost
little to nothing compared to machine shop made parts.  Doug Cadmus came up
with the Frontgate waste can.  I found some perfed stainless cylinders at a
used restaurant supply, although the holes were a bit too large to roast
smaller beans.
The trick is to find innovative ways to build it cheaply.  Scavenge at
metalworking shops for scraps, especially restaurant stainless fabricators.
They toss out tons of 'scrap' that is perfectly good for our purposes.  I've
developed an 'eye' for stainless, and look for it everywhere.  Wal-Mart has
whole aisles of stainless kitchenware, and many of the items sold there can
be cut or modified some way to use for projects right off the shelf.  Good
luck.
Report back when you get the machine shop quotes.
Ed Needhamhttp://www.homeroaster.comed
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7) From: AlChemist John
Sometime around 17:22 11/29/02, Jim Brockman typed:
<Snip>
I am actually finding it to be a little bit more of a tech challenge than I 
expected.  OTOH, I am attempting to built from the ground up, motor, 
heaters etc.  The couplings and bearing are the most difficult so far.
<Snip>
Good luck, hope the sticker shock is not to bad.  Have you or anyone else 
considered other metals other than stainless?  Have you had any luck with 
finding non perforated drums?   That is the direction I am heading in.
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

8) From: John Abbott
John,
	Wouldn't a solid drum present an airflow problem?  How would you extract
the chaff during the process?  I know that very early drums (Like the one on
Tom's homepage) were solid, so it must have worked, but now absolutely none
of the small lot roasters are solid - wondering if there's a reason.
John - the retired version

9) From: Bart Frazee
On Fri, 29 Nov 2002 20:22:17 -0500, you wrote:
<Snip>
The Hottop turns at 57 RPM which doesn't seem to be all that fast as I
watch it running.
Bart
<Snip>
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10) From: Dan Bollinger
<Snip>
The chaff could be winnowed (how's THAT for an archaic term?!) during the
cooling stage.  Dan
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11) From: Ed Needham
I don't see why non-lead brass or aluminum drums wouldn't work just fine.  I
do like the stainless because it does not hold heat as does brass and
aluminum.  On my BBQgrill roaster, the stainless drum is cool to the touch in
minutes, whereas I have to be very careful not to be fooled into touching the
rod (spit) holding it.  Blistering hot.
Barry Jarrett on alt.coffee is making a sophisticated drum roaster with a
brass drum that is not perforated.  I'll be anxious to see how well that
works.
There are numerous perforated stainless trash cans out there.  Finding one
that is well suited for a drum roaster has been a challenge.  I'm sure with
so many of us looking for them, someone is bound to find one.  Then we can
all jump on it and deplete their stock, like we did with Frontgate .
Ed Needhamhttp://www.homeroaster.comed
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12) From: Ed Needham
Faster speeds can't hurt, that's for sure.  Somewhere between turning so fast
the beans stick to the sides, and turning so slow that the beans scorch,
there is an ideal speed.  The 6RPM seems to do well, but I'm thinking a
faster speed would help roast larger batches.
I've recently been successful roasting pound size batches on my BBQ Grill
roaster (although I think the result is a 'very' slightly flatter taste), but
I think the slow rotisserie speed is holding me back from even larger ones.
Ed Needhamhttp://www.homeroaster.comed
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13) From: Dan Bollinger
If faster speeds is what people want, I may be able to help.  I have 12
mixer motors from a hardware store pigment dispenser.  You've probably seen
these.  They are shaded pole, gear reduction motors much like rotisserie
motors.  These are especially nice because they have a metal cover and are
pre-wired.  They are 110volt, .2A, and 30 rpm. See
www.claycritters.com/auction/colorant_dispenser_motor.jpg   I'll sell them
for $12 each, which includes postage. Get them now, because I'll be putting
them on ebay in few weeks.   Dan
<Snip>
fast
<Snip>
but
<Snip>
ones.
<Snip>
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

14) From: Ed Needham
I'll take one for sure.  Email with specifics.  Are you set up with Paypal?
I could easily pay you that way.
Ed Needhamhttp://www.homeroaster.comed
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15) From: Dan Bollinger
I just heard, the HotTop spins at 56rpm.

16) From: Ed Needham
If there is a funnel opening on one end (as on one of the roasters shown on
my web site), and a perforated end cap on the other, air flow could pass
through, and even blow the chaff right out the funnel end.  I would like to
figure out an easy (and elegant) way to blow heated air into one end of a
drum roaster.  Finding parts that withstand 500+ degrees is no small feat.
I'm thinking of a remote motor, with a metal flex shaft, and a metal fan
blade inside the grill, securely mounted to the lower diffusion plate.  I've
got plenty of motors that can do the trick.  Now to find the flex cable and
fan blades to go inside the grill.  Ideas are heartily accepted.
Ed Needhamhttp://www.homeroaster.comed
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17) From: John Abbott
Yep! just timed mine!  56 RPM  I didn't think it was that fast.

18) From: AlChemist John
Ed,
It is like you have seen the design I am working on.  That is essentially 
it.  Baffles created when the lid is closed blows air across the coils, 
around the drum and then through a perforated end to remove chaff and 
improve heating efficiency.
Sometime around 13:57 11/30/02, Ed Needham typed:
<Snip>
I think I have most of the heat tolerant parts found, and am planning on 
using a universal union instead of a flex shaft.
John, see above .
<Snip>
--
John Nanci 
AlChemist at large
Roasting and Blending by Gestalt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

19) From: Ed Needham
Now that I think about it, the shaft can even be a straight shaft, with
bearings or glides mounted outside the grill.  No need for the flex at all.
Hmmm...
Ideas are a-flyin!
Ed Needhamhttp://www.homeroaster.comed
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