On Tuesday 06 June 2017 22:39:16 jeremy youngs wrote: > So pwm to analog 10v is necessary > Yes, and the velocity output from an encoder module to tell this controller how fast the spindle is turning. Its the feedback signal to the PID module. The actual lock step that drives the z axis is determined from the position output of this same encoder module.
There is a spindle speed limit when doing the coarser threads, in the form of the z axis MAXVEL. But I'm not sure it squawks if you exceed it, so don't exceed it. > On Jun 6, 2017 8:55 PM, "Jon Elson" <[email protected]> wrote: > > On 06/06/2017 12:36 PM, jeremy youngs wrote: > >> Isolated, as in opto isolator on the bob ? Thank you > >> > >> > >> The speed command is an analog voltage, so a simple optoisolator > >> won't > > > > work. There are isolated spindle speed controllers that use a PWM > > scheme on an optoisolator and then convert to voltage on the > > isolated side. > > > > Jon > > > > ------------------------------------------------------------ > > ------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > ---------------------------------------------------------------------- >-------- Check out the vibrant tech community on one of the world's > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > [email protected] > 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) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
