Kirk Wallace wrote: >On Sun, 2008-03-09 at 16:29 -0700, Curtis W. Moore wrote: > > >>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? >> >> > >Just in case, the parallel port is fairly limited in speed. I am >guessing 20 to 30 kHz is maximum. If you make a disk, the number of >slots per revolution will be limited to something like 30kHz/3k RPM = 10 > > [snip] Note the common thinko here: 3k RPM is not the same as 3k RPS.
3kRPM = 50 RPS, so if you assume 30 kcounts/sec, you have 30000 Hz / 50 = 600 counts/rev to play with. - Steve ------------------------------------------------------------------------- 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
