Re: [Emc-users] Bandit Steppers
My HobbyCNC board says it is a Unipolar Chopper Control It does 1/2, 1/4, 1/8, 1/16 microstepping. Uses 6 wire (2 common) steppers. C --- Chris Radek [EMAIL PROTECTED] wrote: On Thu, Apr 17, 2008 at 01:14:37PM -0700, Kirk Wallace wrote: http://www.wallacecompany.com/machine_shop/Shizuoka/1-1a.jpg 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 the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Spindle Index
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/vse012070mrt/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/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
