On Sun, 30 Mar 2014, Florian Rist wrote: > Date: Sun, 30 Mar 2014 18:42:57 +0200 > From: Florian Rist <fr...@fs.tum.de> > Reply-To: "Enhanced Machine Controller (EMC)" > <emc-users@lists.sourceforge.net> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Improvised DC Motor Controll using Mesa 7i39? > > Hi Andy > >> You just need to drive the 3-phase PWM pins in the right >> way. Basically set up the DC motor exactly the same as the >> other motors, but don't use the bldc component. You need a >> scale component to create a negative copy of the PID output. >> Then drive two of the 7i39 phases with the positive and >> negative PID. > > > Sounds difficult (for me)... > > > Would leaving the encoder feedback and the PID away simplify things. I'd > be perfectly happy with the PWM signal only, as long as I can set the > ration by a G-Code command. > > See you > Flo
Its all pretty simple for +-24V drive (assuming a 24V power supply) connect DC motor leads to 7I39 A and B outputs and then set 3pwmgen A-value to desired PWM and 3 pwmgen B-value to -desired PWM (you will need the scale comp to get the -desired PWM) If +-12V is enough, you connect dc motor leads to 7I39 A and B outputs and then set 3pwmgen A-value to desired PWM and set 3 pwmgen B-value to 0 > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > 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. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
