On 2014-08-24 21:39, Peter C. Wallace wrote: > On Sun, 24 Aug 2014, John Alexander Stewart wrote: > >> Date: Sun, 24 Aug 2014 15:34:59 -0400 >> From: John Alexander Stewart <[email protected]> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <[email protected]> >> To: "Enhanced Machine Controller (EMC)" <[email protected]> >> Subject: Re: [Emc-users] Debugging help for 5i25/7i76 combo >> >> Hi David, Marius; >> >> and what connectons are you using on the stepper drives , as these have >>> optos , do you have the + positive side of pulse and direction and enable >>> tied to 5+ >>> with the neg sides connected to the 7i76 use STEP0- PIN2 and DIR0- the >>> enable lines can all go together to a single amplifier enable pin >>> put for now leave it disconnected >>> >> Hmmm - I see what you are saying. I wired for each axis (X shown): >> step0- to PUL- on DM856 >> step0+ to PUL+ on DM856 >> dir0- to DIR- on DM856 >> dir0+ to DIR+ on DM856 >> >> ENA+ and ENA- on DM856 currently floating. >> >> It was my attempt of running balanced, with twisted pair between 7i76 and >> drivers. >> >> I'll try tying the + side of pulse, direction, and enable high, and report >> back. >> >> Marius - right now I'm using pncconf - will try the above before digging in >> to the config files. >> >> Thank you: JohnS. > Differential (balanced) should be better as far as noise immunity goes so that > wiring should be fine (assuming the steps are positive edge triggered) > I use those drives all the time as they they are very reliable. You have to invert the step signal as the drive has an opto input.
> > >> ------------------------------------------------------------------------------ >> Slashdot TV. >> Video for Nerds. Stuff that matters. >> http://tv.slashdot.org/ >> _______________________________________________ >> 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. > > > ------------------------------------------------------------------------------ > Slashdot TV. > Video for Nerds. Stuff that matters. > http://tv.slashdot.org/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Regards /Groete Marius D. Liebenberg +27 82 698 3251 +27 12 743 6064 QQ 1767394877 ------------------------------------------------------------------------------ Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
