On Monday 13 July 2020 12:44:06 andy pugh wrote: > On Mon, 13 Jul 2020 at 17:35, Gene Heskett <ghesk...@shentel.net> wrote: > > ROTFLMAO, Peter see's right thru us. ;-) But seriously, the FPGA > > does seem like the ideal place for such a module. > > I disagree, it's a TC / servo thread thing TC?
That servo-thread, at a kilohertz, seems a bit slow to me when it comes to shaping a cams accel/decel ramps, and a well controlled dwell time open so we are not talking about an easy to follow sine wave. The spindle encoder's accuracy will need to be fine tuned as well since the spindle may have more than 1 edge passing in a servo cycle. At 25 rpm, and 240 edges from my bull gear, thats 6000 edges to track a minute. And 25 revs will need a backgear. Doable for a cam maybe, not for a hex headed bolt. I can't test it now, I knocked my index pin off the bull gear yesterday with the backgear. I think, theres a patch of glue only on the bullgear. Damned goop is not oil-proof. Is RTV? No clue where it went, I'll have to make another I expect. But not today, ppty taxesare due. 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) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis 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
