On 24 April 2014 02:17, Jon Elson <el...@pico-systems.com> wrote: > But, yes, a Mesa controller has a full sign/magnitude output > available. I wasn't sure Florian was going to use a > traditional controller and Hal for this.
I think there is some confusion here still. The 7i39 needs three channels of PWM, one channel of PWM for each of the motor phases. It is a mainly-dumb drive with all commutation handled off-board in software. The Mesa three-phase-pwm is capable of providing 6 channels to drive every gate of the 3-phase bridge directly (with shoot-through prevention set by a parameter to the PWM generator) In the case of the 7i39 this is reduced to 3 channels to reduce pin usage and shoot-through inhibition is in hardware. I can't recall which scheme it uses to do this, whether it is 50%=0 or something else. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
