Thanks Andy,
> -----Original Message----- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: September 23, 2023 4:09 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Q about angular vel in dro > > On Sat, 23 Sept 2023 at 22:42, John Dammeyer <jo...@autoartisans.com> > wrote: > > > > Andy, > > Just curious since we have the same harmonic drive and STMBL for the 4th > axis what max velocity and acceleration are you using. > > I just checked, and the numbers are very modest. 100 deg/sec and 250 > deg/sec accel. But the TP will always hit the programmed endpoints > regardless of accel settings, as it calculates within them. > > I don't see the issue that Gene reports because I never home the > rotary. There is no point as I have no indexed workholding and there > is no need for soft limits. > > If I need to align a part, I do it in the usual ways, with indicators > and probes, and then touch-off for alignment. > For fun I doubled up my values to match at least the velocity. The STMBL faulted with a following error by about 12 dgrees of rotation. I'm only running the motor with the DC Servo 105VDC supply rather than the rated 150VDC. (really must finish that power supply one day). With the settings that don't fault it's repeatable for positioning which is probably why I haven't bothered with the replacement power supply yet. I also haven't seen the need for a home switch on the A axis since it ultimately will have a collet chuck clamped to the face plate. Will need to indicate and touch off. Thanks again for the feedback. John > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > � George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > 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
