On Friday 15 May 2020 09:19:32 Dan Henderson 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). there is usually a flea clip jumper to enable/disable that on the bob, but I do not see it on that bob. If you have the usb cable plugged in for stiffer power to the board, one setting or the other should enable that, but check its output status with an ohmeter, they can be very quiet. you should have both the leds behind the usb connector lit, on both bobs if following me. unforch the google link has expired for the relay gizmo and I didn't save it FFR. My bad. > > 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
