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 <[email protected]> > > Reply-To: "Enhanced Machine Controller (EMC)" > > <[email protected]> > > To: [email protected] > > 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. > > 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 > > [email protected] > > 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 > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
