On Wednesday 12 August 2015 12:35:18 Dave Caroline wrote: > Why stepper ? gearing up the speed with a pulley even less sense, they > lose so much torque at a sensible lathe spindle speed that I cannot > understand the reasoning for going down the wrong rabbit hole. > > Just think what would happen if your chatter frequency was anywhere > near the stepper resonance too. > > I do use small lathes (watch (DC) and clockmaker (AC induction motor) > sizes) and need to get the RPM up a lot for small stuff. > > > Dave Caroline
In re gearing up a stepper to get the desired rpms, I am 110% with Dave here. If you do not need the spindle to function as an angle lock at arbitrary angle, then IMO the servo approach beats the stepper by a wide margin. Very wide. 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) 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
