On Sunday 06 December 2020 00:41:20 John Dammeyer wrote: > I was watching a Clickspring video on the construction of a floating > die holder for a small Sherline lathe. He attached a belt drive to > the spindle and using the Division Master indexed the lathe while > running a spinning cutter for grooving the die holder. > > What I was wondering is if LinuxCNC, with a suitable Servo Motor or > high res encoder on the spindle can treat it like a 4th axis on a > mill. > > Realistically if a mill can be run with an AC servo and step/dir > control up to 3000 RPM then there's no reason the lathe spindle > couldn't be run the same way. And with step/dir also serve as a > spindle indexer. > > How easy is that? Or does it require a different version of LinuxCNC. > (ie differnet ini and hal files). The spindle normally only has > speed and direction. It's products like the MESA 7i92H that turn that > request into either PWM or step/dir. > > Would a module like the 7i92H need different FPGA programming to do > the same thing? What about with MachineKit and the BeagleBone Black. > It can use encoders on the spindle. But can it do actual position > control? > With a big enough stepper 1/1 driving the spindle, and an added index sensor, I don't see a good reason why you couldn't run a G76 cycle as long as the motor didn't stall. Light cuts recommended though.
> Just curious. > John Dammeyer > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
