Tony Smith wrote:

> 
> As usual, there's a bit of buggering about making sure the cam isn't
> spinning too fast so it overshoots and re-enagages the microswitch, etc.

The way to handle this is to use a SPDT microswitch that shorts the motor when
it turns off (which stops the motion quicker).
You wire the short through the turn-on relay (can't use a FET here,
unless its a SPDT photmos) so that it's removed at turn on.

Or put a ballast resistor across the motor so that it gets damped when the
power gets turned off.

R

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