Hi Gene, This doesn't answer my question. . How does one tell the spindle to do one revolution at 0.5 rps and stop either after one rev or when a sensor input is detected? Given that I'm running the MESA board in step/dir mode.
Thanks John > -----Original Message----- > From: Gene Heskett [mailto:ghesk...@shentel.net] > Sent: November-23-21 7:44 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Spindle positioning. > > On Tuesday 23 November 2021 21:33:21 John Dammeyer wrote: > > > Still wondering how I might make the spindle turn slowly and then stop > > on a sensor signal. From the HAL file it's set up the same way as the > > XYZA axis with respect to step_type and control-type. > > > > I'd want to set the velocity to say 30 RPM (0.5 RPS) and during a > > revolution if it detects an input the motor is stopped. > > > > # SPINDLE Step Gen signals/setup > > setp hm2_7i92.0.stepgen.05.dirsetup [SPINDLE_9]DIRSETUP > > setp hm2_7i92.0.stepgen.05.dirhold [SPINDLE_9]DIRHOLD > > setp hm2_7i92.0.stepgen.05.steplen [SPINDLE_9]STEPLEN > > setp hm2_7i92.0.stepgen.05.stepspace [SPINDLE_9]STEPSPACE > > setp hm2_7i92.0.stepgen.05.position-scale [SPINDLE_9]STEP_SCALE > > setp hm2_7i92.0.stepgen.05.step_type 0 > > setp hm2_7i92.0.stepgen.05.control-type 1 > > setp hm2_7i92.0.stepgen.05.maxaccel > > [SPINDLE_9]MAX_ACCELERATION setp hm2_7i92.0.stepgen.05.maxvel > > [SPINDLE_9]MAX_VELOCITY > > > > net spindle-enable => hm2_7i92.0.stepgen.05.enable > > net spindle-vel-cmd-rps => hm2_7i92.0.stepgen.05.velocity-cmd > > > For that sort of accuracy, put high rez a/b encoder on the motor > armature, but get the index from a hall effect watching the socket. That > will pretty much do away with quantization noise and will let you set > the stopped point to a small fraction of a degree. > > Or use that stepper with at least a 10x geardown if it has enough > twisting power. Or a stepper with a 90 degree worm drive. I have one of > the small ones with a 5/1 worm that might be able to do my g0704 with a > 3NM nema23 on it. But they make that one at much higher ratios than this > 5/1. There's also good looking plantary inline reducers for nearly the > same money that look stronger than a worm drive. > > > > > > _______________________________________________ > > 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, 1940) > 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
