On Tuesday 20 October 2020 12:08:28 Gene Heskett wrote: > On Tuesday 20 October 2020 07:08:26 andy pugh wrote: > > On Tue, 20 Oct 2020 at 10:22, Gene Heskett <ghesk...@shentel.net> > > wrote: > > > [485180.220310] hm2/hm2_5i25.0: IO Pin 008 (P3-05): PWMGen #0, > > > pin Out1 (Dir or Down) (Output) [485180.220317] hm2/hm2_5i25.0: > > > IO Pin 009 (P3-06): PWMGen #0, pin Out0 (PWM or Up) (Output) > > > > > > Which is NOT where they actually are on the 7i76D! > > > > This leads me to suspect that you are not using the firmware that > > you think you are, or that you are deliberately using a non-7i76 > > firmware. The 7i76 does not use _any_ PWM signals, the spindle > > interface is part of the smart-serial subsystem. > > And in a pwmgen driven spindle, TB4 is worthless except for the enable > on Jon's pwm-servo which is driveing the 1hp spindle motor. > > But now that I've found the PWMGEN.0 signals on STEP4, I'm driving the > spindle normally from those. Which frees up the 2nd pwmgen I was > driving the spindle with. > > > I would expect those PWM signals to be replacing the stepgen4 > > outputs. > > Yes. Zero, zip, squat, nada mention of that teeny little detail. > > > So it is all documented, if you allow for the fact that you are > > using an incorrect (or at least custom) firmware. > > In fact, I'm considering swapping the pwmgen.0/.1's duties to drive > the spindle from pwmgen.1, (as I was formerly doing for the last 4 > years) and use pwmgen.0 to drive the BS-1 motor because of pwmgen.0's > availability of its complementary dir signals on the stepgen4's pins. > Those wires will reach either card in my box so that can be done > rather easily. And it will remove 2 comp modules from the hal file. > Always desirable on slower cpu's. > And indeed, the cable was duff. So I think thats been fixed for a year or so, by cutting both connectors off and squeezing new ones on. And while I was putzing with that, the 150 watt audio board arrived, and I've been playing with that. Laying the motor on the kitchen counter, with a 20 hz sine wave drive from a function generator, the motor makes a great hand massager as I have to hang onto it. :) Its bouncing the output shaft back and forth about 10 degrees in addition to shaking the motor about 1/4" in my hand. However it also appears to be going into some sort of overload shutdown it takes about 2 seconds to recover from. But with a lowered amplitude drive, it ran without undue heat sink temps for a half an hour. Long enough my ancient hands are still about half numb from hanging onto it. So that idea has promise also, as a class D servo driver. Theoreticly all I have to do is do away with the inputs high pass filter to made an analog but class D amplifier. But since this one may shut down, I think I'll test the 420 watter when it arrives Friday.
In the meantime superglue is curing on the new db25 plug, hopefully to hold the assembly tighter that the ones I hit the 55 gallon can with. Thanks Andy. 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
