Lathe mode! https://www.youtube.com/watch?v=P0RP7s-rDsg
sam On Fri, Apr 3, 2020 at 4:21 PM Sam Sokolik <samco...@gmail.com> wrote: > 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
