On Sun, 30 Mar 2014, Andy Pugh wrote: > Date: Sun, 30 Mar 2014 13:39:08 +0100 > From: Andy Pugh <bodge...@gmail.com> > 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? > > > >> On 30 Mar 2014, at 13:04, Florian Rist <fr...@fs.tum.de> wrote: >> >> Hmm, could you explain this a little? >> >> I guess I have to set-up a pwm generator and pins and signals and nets... > > The 7i39 does the hard work. > > 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. > > Probably. I don't have a system to check with here.
That should work, There is also a trick that will allow you to drive 2 DC motors with one 7I39 channel (4 per 7I39) but at 1/2 Vmotor max. To do this you set one PWM channel to 0 (which is 50% PWM or 1/2 VMotor) so in a 24 V setup: you set "V" for 0 = 12V and use it for the DC motor common then U and W can be set to 0 to 24V so relative to "V" you have +-12V motor drive for 2 small DC motors... > ------------------------------------------------------------------------------ > _______________________________________________ > 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
