On Friday 15 May 2020 10:21:26 Dan Henderson wrote: > Okay, this issue appears to be solved. Of all the boneheaded things I > might have done and not tested. Apparently the parallel port cable I > used was either a "printer cable" or just faulty. Swapping out that > cable for another solved this issue.
I didn't think of that. But yes. You also haven't disclosed where you are getting the 2nd parport to drive the 2nd bob. So I assumed you were using something like a mesa 5i25, but be aware if using a 5i25, and supplying 5 volts for the bob, that is ONLY valid with mesa daughtercards, and will short the 5 volt buss in the computer if used with a std bob. It is fused, with a PTC fuse though. So you must use a separate small 5 volt supply or the usb cable to power the bob(s). > The current test that confirmed it was with the onboard relay. I > modified the HAL to use paraport.1.pin-14-out <= > motion-spindle-reverse (p14 on controls the onboard relay). Viola! The > relay clicks on with an M4 and clicks off with an M5! > > It's hard enough when I'm a complete novice at electronic circuitry, > but when you have a faulty cable thrown in the mix? My head is > swimming and attempting a reboot/recovery, lol. And I keep forgetting that I've been messing with electrical stuff since I was about 8 yo, and made my living working with it since I was about 14, essentially skipping high school. That, and I'm a teacher at heart. But I hope that somewhere in my "ravings" is something that will help. > Thanks for all the assistance! > > On Fri, May 15, 2020 at 8:19 AM Dan Henderson <luvtof...@gmail.com> wrote: > > Yes, my plan is to use the onboard BOB relay for spindle power > > on/off. > > > > Dr. Lindner's comment regarding open collectors and the need for a > > pull-up resistor could well solve this riddle.Going to check to see > > if these are OC next. > > Gene your way ahead of where I'm at. I'm just taking it a step at a > > time trying to get a simple external relay to work via the BOB. To > > be fair, I'm not even getting the onboard relay to click by > > outputting to pin 14 (relay trigger). > > > > Curious if something in my HAL is preventing that from happening? Is > > my thought pattern of triggering the logic with M4 valid with the > > spindle-motion-reverse mapped to the output pin specified? > > > > On Fri, May 15, 2020 at 8:08 AM andy pugh <bodge...@gmail.com> wrote: > >> On Fri, 15 May 2020 at 13:56, Gene Heskett <ghesk...@shentel.net> wrote: > >> > If the pix posted yesterday is the external relay in question > >> > here, its > >> > >> a > >> > >> > 10 amp rated contacts relay, and coil current to activate that is > >> > going to be well beyond the bobs ability to deliver the needed > >> > currant. > >> > >> I think that there are extra components on the relay board to > >> account for that. > >> > >> > why not use > >> > pin 14 of bob-0 which WILL have the boosted current > >> > >> Maybe he is using that for spindle on-off? > >> > >> > >> -- > >> atp > >> "A motorcycle is a bicycle with a pandemonium attachment and is > >> designed for the especial use of mechanical geniuses, daredevils > >> and lunatics." > >> — George Fitch, Atlanta Constitution Newspaper, 1912 > >> > >> > >> _______________________________________________ > >> 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 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
