On Thursday 24 January 2019 14:33:46 Peter C. Wallace wrote: > On Thu, 24 Jan 2019, Gene Heskett wrote: > > Date: Thu, 24 Jan 2019 14:25:25 -0500 > > From: Gene Heskett <ghesk...@shentel.net> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <emc-users@lists.sourceforge.net> > > To: emc-users@lists.sourceforge.net > > Subject: Re: [Emc-users] PCW, spindle enable for pico pwm-servo, > > needs 12 volts. > > > > On Thursday 24 January 2019 10:48:14 Peter C. Wallace wrote: > >> On Thu, 24 Jan 2019, Gene Heskett wrote: > >>> Date: Thu, 24 Jan 2019 02:33:54 -0500 > >>> From: Gene Heskett <ghesk...@shentel.net> > >>> Reply-To: "Enhanced Machine Controller (EMC)" > >>> <emc-users@lists.sourceforge.net> > >>> To: emc-users@lists.sourceforge.net > >>> Subject: [Emc-users] PCW, spindle enable for pico pwm-servo, needs > >>> 12 volts. > >>> > >>> On my G0704, which has the OEM motor I'm abusing, I've been > >>> studying up on how to get a 12 volt enable signal, which currently > >>> is a sparkfun contraption driven by a std bob signal. > >>> > >>> But with the 7i76d, can I feed 12 volts into the pin a vfd's 12 > >>> volts would normally drive, ground the Spindle- terminal, and get > >>> the 12 volts for spindle enable from the Spindle Enable+? Page 18 > >>> seems to indicate I could source a few ma that way. I'll be using > >>> a different pin for the pwm signal that amplifier needs, probably > >>> the pwm will show u on step or dir 4, on tb3? > >> > >> The ENA+ and ENA- are just a (normally open) switch (OPTOcoupler > >> transistor) so can be use as such making sure you dont exceed the > >> current rating (50 mA) and obey the polarity > >> > >>> Obviously this is a bridge not crossed yet. And in investigating > >>> where the pwm might show up, there isn't such a critter in the > >>> 5i25 as programmed for the 7i76d! Looks like I will have to load a > >>> software pwmgen and feed it out of a gpio on the 5i25's p2? Why > >>> is this not an error?: > >> > >> Standard 7I76 firmware does not have a PWM generator, there is > >> firmware tha replaces stepgen-04 with a PWM gen, if a 5V PWM signal > >> is OK > > > > On checking dmsg, there is a pwmgen available on p2 of the 5i25 with > > a firmware in it now: > > > > 1067582.985192] hm2/hm2_5i25.0: IO Pin 025 (P2-05): PWMGen #0, > > pin Out0 (PWM or Up) (Output) > > [1067582.985196] hm2/hm2_5i25.0: IO Pin 026 (P2-06): PWMGen #0, > > pin Not-Enable (Output) > > [1067582.985200] hm2/hm2_5i25.0: IO Pin 027 (P2-07): PWMGen #0, > > pin Out1 (Dir or Down) (Output) > > > > Which does NOT appear in the halmeter menu's. Probably because its > > not hooked to anything ATM. > > > > So I'll use that. I assume the 7i76d has no knowledge of that unless > > I cross couple the ENA's in .hal. > > > > Makeing a duplicate of this box to run this 6040 with, the 7i76 > > spindle outputs will I assume drive that VFD. Just needs another > > wire in the cable. > > > >> http://freeby.mesanet.com/5i25_7i76_1px2d.bit > > > > Got it, in case thats not whats in the 5i25 now in the G0704's > > computer. > > If you use this firmware you will have a PWMgen on the stepgen 04 > outputs on the 7I76D > > This is _MUCH_ safer to use than the 5I25 pins directly > > The 5I25 direct I/O pins can be easily damaged by ground bumping that > exceeds the -0.5V limit of the input protection diodes > > Just touching a 5I25 pin to frame ground (with >0.5V of non current > limited AC or HF noise) can damage the input clamp diodes on the FPGA > or bus switch (positive voltages up to 7V are OK, its the -0.5V thats > the issue) > There will be a SainSmart BoB in that path. Its never been a problem before. I've always had an active BoB between the 5i25's output cables and the stuff its controlling.
> >>> loadrt hm2_pci config="num_encoders=1 num_pwmgens=1 > >>> num_stepgens=4" > >>> > >>> I'll sort it, but tis a surprise that no pwmgen shows in the > >>> halmeter menu. Or is it there, and completely gobbled up by the > >>> builtin spinx1 in the 7i76d? Ack the 2 pass output yes its there. > >>> Must figure out how to access its raw output... For the pico amp > >>> the analog out on tb4-2 that would feed a vfd's analog input is > >>> not usable. Looks like I'll need a software pwmgen feeding a gpio > >>> on p2, And feed both pwmgens? Hummm. > >>> > >>> Advice needed Peter. I don't think I'm seeing the whole picture. > >>> > >>> Thanks. > >>> > >>> 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) > >>> 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 > >> > >> Peter Wallace > >> Mesa Electronics > >> > >> (\__/) > >> (='.'=) This is Bunny. Copy and paste bunny into your > >> (")_(") signature to help him gain world domination. > >> > >> > >> > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > 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) > > 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 > > Peter Wallace > Mesa Electronics > > (\__/) > (='.'=) This is Bunny. Copy and paste bunny into your > (")_(") signature to help him gain world domination. > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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) 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
