Andy - I was wonder if that was possible. I would have to look what comes back from the stmbl drive... Or I could just get a better spindle encoder... :)
Try to broach this!! ;) On Tue, Mar 31, 2020 at 3:29 AM andy pugh <bodge...@gmail.com> wrote: > On Tue, 31 Mar 2020 at 05:14, Sam Sokolik <samco...@gmail.com> wrote: > > > The encoder on the motor that goes back to the stmbl is pretty high > count - > > like 20k/rev. But only a small ribbed belt between the motor and the > > spindle. (why I put the gear tooth encoder there) > > So, what you would need would be a PLL to keep the motor encoder > counts in synch with the low-count encoder. > There probably is actually a way to do this. Maybe a PID to add a > phase difference to the motor encoder using the spindle encoder as a > feedback. > > For normal rigid tapping the evidence seems to be that you can get > away with a ribbed belt (20 or 30 turns, typically) but this > application is probably as critical as it gets with many more turns > than usual. > > -- > 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
