primalmommy on mon 6 jun 05
I turned over my noisy old shimpo to see if it was a boy or a girl --
ok, actually to see if I could figure out why it is so damn noisy.
It's old -- an RK-something, cone drive -- and I bought it used last
summer but never use it because I have quieter wheels. I searched the
archives a while back and printed all the "noisy shimpo" advice I could
find, but it was a bewildering array of advice.
I am hoping that if I offer some specifics, somebody can help me narrow
it down and either fix it, or find help getting it fixed.
It seems to be the motor itself that makes all the noise -- a REALLY
loud hum -- makes you jump even when you know it's coming -- you'd
almost have to yell over it. Like a blender noise.
It makes the noise when "idling" -- pedal not engaged, wheel not
turning. No real variation in tone when the wheel is engaged/in use, it
just keeps humming until you turn off the power.
Nothing seems to be loose or rattling.
The wheel is about my age (forty-something) and has likely never had
service of any sort. Bought it from a little old lady who only drove it
on Sundays..
Where to begin? Any suggestions? The men of my family are good at fixing
a lot of things but can only offer, "squirt a little WD-40 in there."
Yours, gratefully
Kelly in Ohio
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Mike Martino on tue 7 jun 05
Hi, I don't know if this applies to your wheel or not, but we have one
in the workshop here that makes the noise you describe. I asked the
reason and was told that wheel has a three phase motor, and the
electricity is single phase. Supposedly, if it's plugged into a 3 phase
power source it will stop making that annoying loud hum.
Maybe check to see if your motor is single or 3 phase.
Hope this helps,
Mike
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
mike martino
in taku, japan
muchimi@potteryofjapan.com
www.potteryofjapan.com
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of primalmommy
Sent: Tuesday, June 07, 2005 3:32 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: noisy old shimpo
I turned over my noisy old shimpo to see if it was a boy or a girl --
ok, actually to see if I could figure out why it is so damn noisy.
It's old -- an RK-something, cone drive -- and I bought it used last
summer but never use it because I have quieter wheels. I searched the
archives a while back and printed all the "noisy shimpo" advice I could
find, but it was a bewildering array of advice.
I am hoping that if I offer some specifics, somebody can help me narrow
it down and either fix it, or find help getting it fixed.
It seems to be the motor itself that makes all the noise -- a REALLY
loud hum -- makes you jump even when you know it's coming -- you'd
almost have to yell over it. Like a blender noise.
It makes the noise when "idling" -- pedal not engaged, wheel not
turning. No real variation in tone when the wheel is engaged/in use, it
just keeps humming until you turn off the power.
Nothing seems to be loose or rattling.
The wheel is about my age (forty-something) and has likely never had
service of any sort. Bought it from a little old lady who only drove it
on Sundays..
Where to begin? Any suggestions? The men of my family are good at fixing
a lot of things but can only offer, "squirt a little WD-40 in there."
Yours, gratefully
Kelly in Ohio
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Wood Jeanne on tue 7 jun 05
Hi Kelly,
I use an old RK2DW Shimpo, it also gets very noisy.
solution is just to change the belt.
-Jeanne W.
--- primalmommy wrote:
snip:
> It's old -- an RK-something, cone drive -- and I
> bought it used last
> summer but never use it because I have quieter
> wheels. I searched the
> archives a while back and printed all the "noisy
> shimpo" advice I could
> find, but it was a bewildering array of advice.
>
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Gail Phillips on tue 7 jun 05
Mike -
Sorry, man. Someone was trying their level best to pull your leg. Looks like they succeeded. A three-phase motor won't run on single-phase, and besides, they have a 4-prong plug. So that ain't it, Kelly.
If it is of any comfort, mine is noisy too - I put some of that anti-fatigue mat foam floor pad you get at Sam's Club (or other places) under mine, and it quieted it down some.
- Gail Phillips, ex-postal maintenance mechanic, who thought the coolest thing about three-phase is that when reversing two of the legs of power, the motor will turn backward. Sure helped getting those jammed mail sacks out of the conveyors!
Mike wrote:
I asked the
> reason and was told that wheel has a three phase motor, and the
> electricity is single phase. Supposedly, if it's plugged into a 3 phase
> power source it will stop making that annoying loud hum.
> Maybe check to see if your motor is single or 3 phase.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> It seems to be the motor itself that makes all the noise -- a REALLY
> loud hum -- makes you jump even when you know it's coming -- you'd
> almost have to yell over it. Like a blender noise.
> Kelly in Ohio
>
Vince Pitelka on tue 7 jun 05
> Where to begin? Any suggestions? The men of my family are good at fixing
> a lot of things but can only offer, "squirt a little WD-40 in there."
Kelly -
So, did you squirt a little WD-40 in there? Actually, the best that WD-40
will do is to tell you that lubrication will help. WD-40 goes away pretty
quickly. It is a moisture displacer and a penetrant, but a poor lubricant.
If the motor has oil entry points for the bearings, make sure that the wheel
is tilted in such a way that the oil will flow by gravity down to the
bushings or bearings.
First, try lubricating the bushings or bearings with a good light engine
oil - 10W household oil is fine. Or, go to an auto parts store and get a
pint of Marvel Mystery Oil - it is a top-end oil intended to lubricate the
valve train on automotive engines, but it makes a wonderful household and
general machine oil, and it even smells good. Just put some in a little
squirt oil can for household utility tasks.
On the early RKs, I believe that the motors have bushings rather than ball
bearings, and if the bushings are going bad that would certainly account for
the hum. Most small motor bushings are sintered bronze, which is a slightly
porous bronze. That makes it hold oil for a prolonged period of time. It
works well, but once the bushing runs out of oil, it wears out quickly and
usually vibrates pretty badly. On small motors, it usually is not
cost-effective to replace the bushings or bearings. Usually it is less
expensive to simply replace the motor, but I do not believe that Shimpo
offers a replacement motor any more for the early RK wheels.
When I built my faux-Shimpo, I purchased the cone and rubber drive rings,
and had the cone bored out to fit a domestic motor shaft rather than the
Japanese metric size. Then I was able to use an inexpensive American 1/2 HP
motor. If you know a machinist, you can get her/him to bore out the cone,
but make sure they understand that the job must be absolutely true. By the
time you bore out the cone and buy a motor you will probably have spent at
least $100.
There are a variety of standard frame and mount setups for electric motors,
so you will need to make sure that you get a motor that has the same frame
and mount as the original. Otherwise, the mounting assembly on the wheel
might need to be modified, and that could be a lot of trouble.
Good luck -
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
Vince Pitelka on tue 7 jun 05
> I use an old RK2DW Shimpo, it also gets very noisy.
> solution is just to change the belt.
Jeanne -
That is often the case with those old Shimpos if the noise happens only
after you engage the drive. But in Kelly's case the noise is present
whether the motor is idling or engaged, so the problem must be in the motor.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
claybair on tue 7 jun 05
Hi Kelly,
I have an old RK-8. When I bough it several years ago
I found it had an annoying thump-thump as the wheel head turned.
I replaced the belt and the noise diminished then disappeared.
What I was told was that the ring/belt gets a depression in it if you leave
it in an engaged
position which results in the thump- thump.
If you change the belt be sure the pedal is completely in the off position
when not in use.
I'm not sure how old my RK-8 is.... it's ancient for sure but
I love it. It looks like it must have been the inspiration for
Star Wars R2D2 which is what I call it.
Does anyone know how old it is or when it was manufactured?
I left my CI and Axner wheels in WA and took the Shimpo to my studio in
Tucson.
It took up less space and functions as a banding wheel which meant less
items to move
and pack into the van.
Gayle Bair
Bainbridge Island, WA - finally getting better actually went into the studio
today.
The weeds got a reprieve and are free to invade my garden beds a while
longer.
Tucson, AZ
http://claybair.com
-----Original Message-----
From: Wood Jeanne
Hi Kelly,
I use an old RK2DW Shimpo, it also gets very noisy.
solution is just to change the belt.
-Jeanne W.
--- primalmommy wrote:
snip:
> It's old -- an RK-something, cone drive -- and I
> bought it used last
> summer but never use it because I have quieter
> wheels. I searched the
> archives a while back and printed all the "noisy
> shimpo" advice I could
> find, but it was a bewildering array of advice.
>
--
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Mike Martino on wed 8 jun 05
I hate it when that happens!
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Gail
Phillips
Sent: Wednesday, June 08, 2005 1:49 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: noisy old shimpo
Mike -
Sorry, man. Someone was trying their level best to pull your leg. Looks
like they succeeded. A three-phase motor won't run on single-phase, and
besides, they have a 4-prong plug. So that ain't it, Kelly.
If it is of any comfort, mine is noisy too - I put some of that
anti-fatigue mat foam floor pad you get at Sam's Club (or other places)
under mine, and it quieted it down some.
- Gail Phillips, ex-postal maintenance mechanic, who thought the coolest
thing about three-phase is that when reversing two of the legs of power,
the motor will turn backward. Sure helped getting those jammed mail
sacks out of the conveyors!
Mike wrote:
I asked the
> reason and was told that wheel has a three phase motor, and the
> electricity is single phase. Supposedly, if it's plugged into a 3
> phase power source it will stop making that annoying loud hum. Maybe
> check to see if your motor is single or 3 phase.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> It seems to be the motor itself that makes all the noise -- a REALLY
> loud hum -- makes you jump even when you know it's coming -- you'd
> almost have to yell over it. Like a blender noise. Kelly in Ohio
>
________________________________________________________________________
______
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
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