Jinx wrote:

> > The other problem I foresee is lateral wear on the shaft of the
> > disc due to the centrifugal force. This is why I suggested
> > mounting the motor so the length of the shaft is along the line of
> > centrifugal force, and this force is absorbed by some form of thrust
> > bearing, to stop lateral wear of the motor bearings.
>
> That orientation was my preference too. I'm thinking now that it
> would be pushing it to get 10rps from a stepper. Think I'd be
> happier with a DC motor, about 10:1 reduction

That orientation would cause problems with precession.
Also 10rps is fine for most steppers, even older
ones. I have a "surplus" stepper here, quite low spec,
doing 30rps no problems.

Has anyone worked out the g forces for 7rps and
a 1 metre radius yet? :o)
-Roman

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