Na, that wasn't my purpose so please let Mach stay out of this. :)
Thanks for the replies, I was interested in the theoretical manner.
Regards,
Sven
2007/10/15, Chris Radek <[EMAIL PROTECTED]>:
>
> On Mon, Oct 15, 2007 at 05:24:01PM +0200, Svenne Larsson wrote:
> > Guys,
> >
> > Out of curiosity, can an EMC lathe make threads without spindle
> feedback?
> > On cnczone.com a guy posted pictures on a thread made with Mach without
> > spindle feedback, only a VFD as speed controller. They looked truly
> good.
> >
> > I know there are problems with it (torque figures, exact positioning,
> RPM
> > loss etc), but is it possible with EMC?
>
> Well you could command S300, trust your spindle to run that speed, and
> cut a thread with G1.
>
> Alternately, there are all sorts of tricks you could do in HAL to
> synthesize the spindle position signal that the motion controller
> requires to cut threads. I don't recommend any of them.
>
> (I really hope this doesn't trigger another thread [haha] about Mach)
>
> Chris
>
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