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
