Douglas and Marjorie King on sat 16 jun 01
Hello - One of our favorite electric wheels is a 25 year old Creative =
Industries Variable Speed Wheel with a 1HP motor. The good news is that =
it is bullet proof workhorse that will turn anything. The bad news is =
that the electric motor has a very annoying whine that is finally =
driving us nuts. We have been told by several people that there is an =
electronic device that silences these electric motors. Can anyone =
direct us to someone who can supply a "whine silencer?" Thank you in =
advance.
Marjorie King Studio Clay Art Pottery [TM]
marjorieking@marjoriekingstudio.com
Fredrick Paget on sun 17 jun 01
Hi,
I have not examined your wheel so this is only a guess.
If it is not some kind of mechanical problem - such as bearings (bad
bearings make a sound like a freight train going by)- it could be that the
electric wave form into the motor is not a smooth DC but a pulsating DC
(120 hertz with a lot of harmonics) which a common control circuit
produces.
Most manufacturers of wheels put a silencer (called a filter) in the line
between the motor and the controller to smooth out the DC. It is a whopping
big electrolytic capacitor (About the size of a can of Campbell's tomato
soup- maybe not so fat as that but in a can ) with an inductor (also
called a choke- looks like a small transformer) ahead of it, that is
speaking electrically it is ahead of it - the actual parts can be mounted
anywhere under the wheel.
Now there are two possibilities; 1) there is no filter; 2) the filter is
there but the capacitor is old and dried out. They have a lifetime, you see
-and needs replacement.
Why not contact Creative Industries, They are still in business in Southern
California. E-mail: potwheel@creative-ind.com http://www.creative-ind.com .
Fred Paget
Hello - One of our favorite electric wheels is a 25 year old Creative =
>Industries Variable Speed Wheel with a 1HP motor. The good news is that =
>it is bullet proof workhorse that will turn anything. The bad news is =
>that the electric motor has a very annoying whine that is finally =
>driving us nuts. We have been told by several people that there is an =
>electronic device that silences these electric motors. Can anyone =
>direct us to someone who can supply a "whine silencer?" Thank you in =
>advance.
>
>Marjorie King Studio Clay Art Pottery [TM]
>marjorieking@marjoriekingstudio.com
>
>______________________________________________________________________________
>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.
>From Fred Paget, Marin County, California, USA
Douglas and Marjorie King on mon 18 jun 01
Many thanks for the suggestions and the lead. You are right. There is
supposed to be a filter unit the size of a big soup can that plugs in
between the motor and the wall to silence the whine because it is an
electrical not a mechanical problem. They stopped making these units years
ago. We called Creative a few years ago and they said they don't make
filters for a wheel that old, but they do make them for more recent ones.
Do you have any ideas where I can get a filter? Thanks again.
Margie King
marjorieking@marjoriekingstudio.com
----- Original Message -----
From: "Fredrick Paget"
To:
Sent: Sunday, June 17, 2001 10:29 AM
Subject: Re: Help Find Electric Wheel Silencer
> Hi,
> I have not examined your wheel so this is only a guess.
> If it is not some kind of mechanical problem - such as bearings (bad
> bearings make a sound like a freight train going by)- it could be that the
> electric wave form into the motor is not a smooth DC but a pulsating DC
> (120 hertz with a lot of harmonics) which a common control circuit
> produces.
> Most manufacturers of wheels put a silencer (called a filter) in the line
> between the motor and the controller to smooth out the DC. It is a
whopping
> big electrolytic capacitor (About the size of a can of Campbell's tomato
> soup- maybe not so fat as that but in a can ) with an inductor (also
> called a choke- looks like a small transformer) ahead of it, that is
> speaking electrically it is ahead of it - the actual parts can be mounted
> anywhere under the wheel.
> Now there are two possibilities; 1) there is no filter; 2) the filter is
> there but the capacitor is old and dried out. They have a lifetime, you
see
> -and needs replacement.
> Why not contact Creative Industries, They are still in business in
Southern
> California. E-mail: potwheel@creative-ind.com http://www.creative-ind.com
.
> Fred Paget
>
> Hello - One of our favorite electric wheels is a 25 year old Creative =
> >Industries Variable Speed Wheel with a 1HP motor. The good news is that
=
> >it is bullet proof workhorse that will turn anything. The bad news is =
> >that the electric motor has a very annoying whine that is finally =
> >driving us nuts. We have been told by several people that there is an =
> >electronic device that silences these electric motors. Can anyone =
> >direct us to someone who can supply a "whine silencer?" Thank you in =
> >advance.
> >
> >Marjorie King Studio Clay Art Pottery [TM]
> >marjorieking@marjoriekingstudio.com
> >
>
>___________________________________________________________________________
___
> >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.
>
>
> >From Fred Paget, Marin County, California, USA
>
>
____________________________________________________________________________
__
> 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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