On Friday 25 October 2019 02:28:47 Gene Heskett wrote: > On Thursday 24 October 2019 22:24:10 Peter C. Wallace wrote: > > On Thu, 24 Oct 2019, Gene Heskett wrote: > > > Date: Thu, 24 Oct 2019 21:44:36 -0400 > > > From: Gene Heskett <ghesk...@shentel.net> > > > Reply-To: "Enhanced Machine Controller (EMC)" > > > <emc-users@lists.sourceforge.net> > > > To: "Enhanced Machine Controller (EMC)" > > > <emc-users@lists.sourceforge.net> Subject: [Emc-users] hal syntax > > > maybe? > > > > > > Greetings all; > > > > > > I have added two pwmgen's to the config strings of my 6040's 5i25 > > > config strings, and they show up in the dmesg as > > > > > > hm2/hm2_5i25.0: IO Pin 008 (P3-05): PWMGen #0, pin Out1 (Dir > > > or Down) (Output) > > > hm2/hm2_5i25.0: IO Pin 009 (P3-06): PWMGen #0, pin Out0 (PWM > > > or Up) (Output) > > > > > > These two above with a straight thru cable would show up on the > > > 7i76D as dir4 and step4, which would be pretty handy using step4 > > > to drive an IRF520 based motor switch. > > > > > > > > > hm2/hm2_5i25.0: IO Pin 025 (P2-05): PWMGen #1, pin Out1 (Dir > > > or Down) (Output > > > hm2/hm2_5i25.0: IO Pin 026 (P2-06): PWMGen #1, pin Out0 (PWM > > > or Up) (Output) > > > > > > And they now show in a halconfig as: > > > 12 bit IN FALSE hm2_5i25.0.pwmgen.00.enable > > > 12 float IN 0 hm2_5i25.0.pwmgen.00.value > > > 12 bit IN FALSE hm2_5i25.0.pwmgen.01.enable > > > 12 float IN 0 hm2_5i25.0.pwmgen.01.value > > > which surprises me as there is not any associated addf's. And any > > > attempt to add them is an error Can I assume they are ready to > > > rock and roll? > > > > The PWM is a hardware device, not a component so no addf is needed > > If a hardware, its not limited to servo-thread rep rate then. My > thoughts are, because there is a certain amount friction, a lower > frequency pulseing would tend to shake it out of the stiction better, > giving a more linear delivery at low speeds. Might not, but thats my > thinking. I had in mind perhaps a starting frequency of 50 or 100 hz > for that just to make it vibrate against the built-in stiction by > giving a longer on time. I'll write a pyvcp slider to be able to > mouse its speed. > Best, cleanest output as seen by the halscope seems to be at a frequency equal to the servo-thread, 1 kilohertz, according to what I see on the halscope. But it is a bit noisy at the transitions. Thats also pretty close to the servo thread. Is there a way to synchronize that?
Thanks Peter. I hope you aren't in the middle of those fires. 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
