I have LinuxCNC fully operational. In halscope I’m able to view the signals for both the spindle index, phase a, and I now have phase b hooked up. I’m conducting my testing with the LinuxCNC MDI. The number on the opto chips is EL817C807. The BOB PN is DB25-1205.
On Tue, May 5, 2020 at 8:08 PM Gene Heskett <ghesk...@shentel.net> wrote: > On Tuesday 05 May 2020 20:17:45 Dan Henderson wrote: > > > Slowing things down had marginal effect. Okay sounds like I need to by > > pass the optocouplers. Would you recommend I bypass all the encoder > > inputs as well as the PWM output to the MC2100 controller? > > Only if it has opto's for isolation, they can effect to duration of the > pwm playing hob with the speed linearity. If the motor is "hunting", > something else is going on. The m2100 ISTR is the controller that came > in the treadmill and its a very serious case of built by lowest bidder, > I was not able to use it in anything I've tried. Control was extremely > non-linear until I put a 47k resistor between linuxcnc and its summing > point, That helped but it was still flaky. Not to mention that all of > its control circuitry is on the hot side of the power line and quite > dangerous. > > I am not a machinist, but a long retired broadcast engineer and a CET so > much of the high power stuff comes out of my junk box. The psu for > instance, makes about 120 volts DC at a surge current of 20 amps, 10 > forever, way more that the 1hp motor I'd put on the back of a 7x12 lathe > is rated for. Capable of getting 2hp out of that 90 volt motor. But it > kept breaking drive parts once I had obtained one of the pico systems > pwm-servo drivers. So I've gone into the hal file and slowed the motors > acceleration to something that doesn't break stuff any more. But that > might explain why my troubleshooting is geared to the electronics, and > possibly is different than what a real machinist might do to solve an > identical problem. > > Other than that it doesn't sound as if the opto's speed is your problem. > > So 2 other questions: > > What to you have in the way of meters and oscilloscopes for > troubleshooting? > > Do you actually have LinuxCNC running well enough to try to control your > motor? > > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
