The references I found say mach outputs a 200hz signal. I had tried it down to 100hz.. With computer driven pwm the resolution of the is base thread frequency/pwm frequency. So - when I was playing around with a charge pump at 10khz and base freq of 20khz - you get 0,50% and 100%. 1khz gives you about 20 levels. 200hz gives you about 100 levels.
(I have tried at least down to 100hz..) sam On Wed, Nov 25, 2020 at 3:17 AM John Dammeyer <jo...@autoartisans.com> wrote: > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > -it is sloooowwwww. It is most likely a simple low pass. The photo here > > is of a 1khz pwm signal modulated by a 1hz (yes - hz) sin wave. You can > > already see it is phase shifting. 10hz and it is attenuated to about 2v > > p-p. > > -the pwm frequency didn't really affect the linearness or performance. > > Just a note on this. The user manual for this BoB shows the MACH3 setup > as 100Hz for the PWM frequency not 1kHz. If I can clear space on my bench > tomorrow I'll feed a programmable waveform generator into it and scope the > output. But 100Hz is pretty low for PWM 0V-10V. > > > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
