Fredrick Paget on tue 3 jun 03
>In designing a motor you have to make choices. You can make it big
>and heavy andcool running or you can make it small and cute and save
>money and space but it will get hot for the same power output as the
>big brute. . So what they usually do is build some fan blades
>inside the motor to pull cooling air through it. This works fine as
>long as the motor is running at good speed but if the motor is just
>barely turning over it won't get any air and will heat up. Solution
>to that is install an external fan that runs at full speed all the
>time and that is evidently what this wheel manufacturer has done.
>Just a good engineering solution to the ever present problem of
>designing gear cheap enough that they can sell it in a competitive
>market.
Fred
>Hi everybody!
>just signed up for the post. Would like to know if it is true that motors
>have to be cooled down to give uniform power?
Rosie
--
From Fred Paget, Marin County, California, USA
rosie limburger on tue 3 jun 03
Hi everybody!
just signed up for the post. Would like to know if it is true that motors
have to be cooled down to give uniform power? I was looking at a Shimpo
model, I think it is the V75 and they have a fn underneath....just curious
if this is really needed.
Thanks,
Rosie
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Vince Pitelka on wed 4 jun 03
Rosie -
Some sealed motors used on pottery wheels have a fan and shroud on the
bottom of the motor that sends a stream of air through heat sinks on the
outside of the motor casing, drawing off the heat. I can't imagine any
other reason to have a fan on a pottery wheel, but there could be new
technology that I am not aware of.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dtccom.net
615/597-5376
Office - wpitelka@tntech.edu
615/597-6801 x111, FAX 615/597-6803
http://iweb.tntech.edu/wpitelka/
jnybravo2 on wed 4 jun 03
--- In clayart@yahoogroups.com, rosie limburger
wrote:
> Hi everybody!
> just signed up for the post. Would like to know if it is true that
motors
> have to be cooled down to give uniform power? I was looking at a
Shimpo
> model, I think it is the V75 and they have a fn underneath....just
curious
> if this is really needed.
>
> Thanks,
> Rosie
>
> Hi Rosie, Welcome to the list. I don't know about the fan, but if
you are considering buying the Shimpo Velocity 75, it is a great
wheel. I have one and I love it. Good luck, John Horner
Fredrick Paget on wed 4 jun 03
One more thing - if the wheel in question is the new Shimpo that I
saw at NCECA I didn't see a fan but there could well be one hidden
in the bottom somewhere. It is a wheel with a whole different
approach and it has an electronic power supply that runs a multipolar
motor. The fan could be there to cool the heat sinks in the power
supply as well as the motor,
Fred
--
From Fred Paget, Marin County, California, USA
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