If I added pulses can it be done? My encoder is just a homebuilt opto switch. Cutting out a new wheel with more slots/holes would be trivial. Can EMC thread with just one train of pulses? Ie use just one pin of the parallel port?
--- John Kasunich <[EMAIL PROTECTED]> wrote: > Curtis W. Moore wrote: > > I have been using Turbocnc as a control on my lathe. Turbocnc need > just > > one pulse per rev to to lathe threading. Is there a way to do this > with EMC2? > > > > > > Not a the moment. > > Many folks (me among them) believe that you really need quite a few > counts per revolution to make good threads. If you only have one > pulse > per rev, you are counting on the spindle to hold exactly the same > speed > over each revolution, without varying even a tiny bit under cutting > load. > > That said, lots of people get "acceptable" results using one count > per > revolution with other software. It is technically feasible to write > a > HAL component that takes a once-per-rev index pulse and generates > spindle position feedback that looks like a higher resolution > encoder. > This will work ONLY if the spindle holds a constant speed over many > revolutions. If somebody writes that component, EMC could use it to > do > once-per-rev threading, with the understanding that the thread > quality > is only going to be as good as the spindle speed stability. > > Regards, > > John Kasunich > > > > > ------------------------------------------------------------------------- > 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 > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ------------------------------------------------------------------------- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
