Hi, just to make sure, have you checked if your BOB has open collector outputs. If so you need to supply a pull-up resistor between output and +5V and the output needs to be defined inverted.
Br, Andreas Dr. Andreas O. Lindner Lindner TAC Auhofstraße 11 B / 11 1130 Wien Austria Fax: +43 1 877 68 73 Mobil: +43 664 41 24 742 Email: a.lind...@lindner-tac.at Web: http://www.lindner-tac.at > Am 15.05.2020 um 13:31 schrieb Dan Henderson <luvtof...@gmail.com>: > > I was just testing any pin. I have two BOB’s connected to two parallel > ports. All my steppers are working on BOB zero. No issues with any of > that. BOB “1” has spindle-motion-reverse => paraport.1.pin-04-out. From > this BOB I have both + and - 5v going to Inputs of external relay along > with output of pin 04. By issuing M4, I assumed would get a click or > trigger from external relay? This could also have been setup for > coolant/air or any external device. I have not connected anything to the > business end of the relay. Not sure if that would matter. Also, the BOB is > powered by USB not sure if that matters. I have the ability to power it > with an external 5 volt source as well. > > On Fri, May 15, 2020 at 3:59 AM andy pugh <bodge...@gmail.com> wrote: > >> On Fri, 15 May 2020 at 01:33, Dan Henderson <luvtof...@gmail.com> wrote: >>> >>> Hello everyone, I have a simple question for you. I’m testing the ability >>> to trip a simple 5v relay with an output pin from a 5 axis BOB and don’t >>> seem to be having any luck. I have motion-spindle-reverse mapped to the >>> output pin (04). >> >> When you say "pin (04)" do you mean parallel port pin 4 or BoB pin 4? >> BoB Pin 4 is a limit input, connected to parport pin 13, and is an >> input not an output. >> >> Parallel port pin 4 is connected to the STEPY output, and I suspect >> you need that for moving your Y axis? >> (If not, then it probably should work) It looks like the relay board >> probably needs a 5V supply in addition to the logic and gnd >> connections. >> >> -- >> 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users