Re: Re: Is this too nuts to consider ?

On 25 Jan, CAD_CAM_EDM_DRO@egroups.com wrote:

> What you are talking about has allready been done. Connecting a stepper or
> servo to the lead screw and then placing a small magnet on the spindle
> pulley so that it passes by a sensor so that the controller always knows what
> the relationship between spindle and leadscrew is. It is called "the Frog"
> <A HREF="http://www.miclog.com/frog/">Frog - low cost X-axis CNC for micro
> lathes</A>

That's obviously not going to work in this case ( nor in any case where
the motion of the leadscrew is large compared to the rotational rate of
the spindle ).

Alan

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Alan Rothenbush | The Spartans do not ask the number of the
Academic Computing Services | enemy, only where they are.
Simon Fraser University |
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