I really like the ZIP drive cable in one of the first images. That brings back memories (pun possibly).
I have the same BOB and Rigol, but neither are getting as much use as yours. Mark On Wed, Nov 25, 2020 at 7:50 AM Sam Sokolik <samco...@gmail.com> wrote: > Here is an image of 100hz pwm modulated with 1hz sin wave. (sent to the > bob and measuring the analog out. > > > http://electronicsam.com/images/greenmachine/VID_20201124_215508_exported_0_1606319177524.jpg > > On Wed, Nov 25, 2020 at 8:29 AM Sam Sokolik <samco...@gmail.com> wrote: > > > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
