On Monday, 18 April 2022 18:19:06 EDT Peter C. Wallace wrote: > On Mon, 18 Apr 2022, gene heskett wrote: > > Date: Mon, 18 Apr 2022 18:11:54 -0400 > > From: gene heskett <ghesk...@shentel.net> > > Reply-To: "Enhanced Machine Controller (EMC)" > > > > <emc-users@lists.sourceforge.net> > > > > To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] nother Q > > for Peter > > > > On Monday, 18 April 2022 17:33:48 EDT Peter C. Wallace wrote: > >> On Mon, 18 Apr 2022, gene heskett wrote: > >>> Date: Mon, 18 Apr 2022 16:37:48 -0400 > >>> From: gene heskett <ghesk...@shentel.net> > >>> Reply-To: "Enhanced Machine Controller (EMC)" > >>> > >>> <emc-users@lists.sourceforge.net> > >>> > >>> To: "Enhanced Machine Controller (EMC)" > >>> <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] nother Q > >>> for Peter > >>> > >>> On Monday, 18 April 2022 13:49:36 EDT gene heskett wrote: > >>>> On Monday, 18 April 2022 10:38:10 EDT Peter C. Wallace wrote: > >>>>> On Mon, 18 Apr 2022, gene heskett wrote: > >>>>>> Date: Mon, 18 Apr 2022 04:19:27 -0400 > >>>>>> From: gene heskett <ghesk...@shentel.net> > >>>>>> Reply-To: "Enhanced Machine Controller (EMC)" > >>>>>> > >>>>>> <emc-users@lists.sourceforge.net> > >>>>>> > >>>>>> To: "Enhanced Machine Controller (EMC)" > >>>>>> <emc-users@lists.sourceforge.net> Subject: [Emc-users] nother Q > >>>>>> for > >>>>>> Peter > >>>>>> > >>>>>> Greetings; > >>>>>> > >>>>>> How does the A/D on a 7i76D handle overvoltage? I'm considering > >>>>>> a > >>>>>> long > >>>>>> tailed vfet pair with a 22k pullup to 42 volts. Does it just > >>>>>> goto > >>>>>> full > >>>>>> scale at an $FF output, or will that blow something? > >>>>> > >>>>> Full scale (inputs will take up to 100V indefinitely) > >>>>> but adjacent inputs may read incorrectly if more than about > >>>>> 50V is suppled (due to current injection into parasitic > >>>>> transistors related to the input ESD diodes of the CPU) > >>>> > >>>> Excellent news Peter, I'm off to the races then. > >>> > >>> But the starting gate won't open. I've re-read 7i76man.pdf several > >>> times w/o the method of actually getting the digital value from one > >>> of the 4 ports it works for. I have something tied to port-0, but I > >>> think that may be a leftover from before I used the hy-485 module > >>> to > >>> drive the spindle, so it looks like I should figure on using > >>> port-1. > >>> > >>> How does reading an A/D derived digital value from port-1 get done > >>> in > >>> the hal file? > >>> > >>> Thank you. > >>> > >>> 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, 1940) > >>> If we desire respect for the law, we must first make the law > >>> respectable. - Louis D. Brandeis > >> > >> The pins are: > >> > >> hm2_5i25.0.7i76.0.0.analogin0 > >> hm2_5i25.0.7i76.0.0.analogin1 > >> hm2_5i25.0.7i76.0.0.analogin2 > >> hm2_5i25.0.7i76.0.0.analogin3 > >> > >> > >> You need to set the 7I76 in a mode that enables the analog inputs > >> (modes 1 or 2) > > > > That sounds like it should be a setp, but it doesn't jump off of page > > 31 at me. Looking at the analogin0, I'm seeing a flash of noise at > > about 1 second intervals which I assume is the update rate. And I > > don't currently have any setp's that seem to address the 7i76. Do I > > need to dl a fresh copy of the 7i76man.pdf? I've had this one for > > 3, maybe 4 years. > The analog update rate is the servo thread rate (the aquisition rate is > about 50 KHz)
That will help. Its currently running the servo thread at 2 kilohertz. > If you have a analogin0 pin you are have already setup a mode that > includes analog input > > (the mode setup is done in the sserial_port_0=NNNXXXX line in the > driver command line) this line? loadrt hm2_pci config="num_pwmgens=1 num_stepgens=4 num_encoders=1 sserial_port_0=1xxx" I am useing 0-3 stepgens. pwmgen0 purportedly steals stepgen4's pins, ahh, base number 0. my mistake. pwmgen0 uses stepgen4's pins according to what I have deciphered. But I was using 4 stepgens. Now XYZB. And it appears the pwmgen0 was also replaced by the hy-vfd so I can use it for this without adding another pwmgen1. I don't think I've anything wired to those two pins now. Gotta get my head around this hal file better. Been too long since I configured it. And oldtimers seems to be the thing now. Thanks Peter. 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, 1940) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
