> > 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.
A couple of years ago the same happened to the 5i20 I'm using on one of the grinders. We spent half of the day trying to figure out what the hell was happening. We then realize it was the flat cable that was bad. El mar., 20 oct. 2020 a las 18:22, Gene Heskett (<ghesk...@shentel.net>) escribió: > 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 > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
