On 25 September 2012 20:03, Jason Burton <lathebuil...@gmail.com> wrote:
> Don't really want to put $300+ into an experimentation platform that ends > up slower than what i could build from my "junk" box. One option would be to make your own drive. LinuxCNC + a Mesa card can generate the 6 PWM signals needed for a 3-phase H-bridge. (This idea requires the 3-phase pwmgen in the Hostmot2 code. I have considered writing a software 3-phase PWM, but I am not convinced that it would be useful) Then one of these, and a bit of stripboard: http://uk.rs-online.com/web/p/motor-driver-ics/7165429/ It is also possible to do it with an Arduino. One Mega ought to be able to run 3 motors fairly easily. AFAIK the Arduino doesn't support 3-phase PWM, when I did it I used a single-phase PWM and a buffer chip to "mux" it out to the three high-side drivers. Alternatively, djdelorie on the IRC seems to be quite well through designing his own brushless motor drive. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
