Hi Ian, My understanding of the threading module is simply that is coordinates motion between the spindle and the X and does not need to control the speed of the spindle. Hence an AC motor will serve.
It is my impression that you need much higher rpm on the spindle than you can get with a stepper. People have used 360 ppr encoders with index on the spindle and done just fine. I'm plotting a lathe conversion sometime this summer but have a few speed bumps to get over first. HTH Dave Project sequence: first one plots, then one schemes and if that doesn't work then on connives. On Feb 23, 2008, at 1:20 AM, Ian W. Wright wrote: > <snip> > Now I'm set along the line of using a stepper motor to drive my lathe > spindle, how d'you reckon I might be able to get it to turn > continually > like a normal lathe when I'm not wanting to use it for screwcutting - > i.e. to do normal turning? Am I going to have to set up another > separate > driver and pulse generator or is there a way to persuade EMC2 to set > one axis going and then ignore it while running G-code on the others? > > -- > Best wishes, > > Ian > ____________ > Ian W. Wright > Sheffield UK > > "The difference between theory and practice is much smaller in > theory than in practice..." > > > ---------------------------------------------------------------------- > --- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
