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.
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. 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
