On Sun, 24 Apr 2011, andy pugh wrote: > Date: Sun, 24 Apr 2011 16:01:04 +0100 > From: andy pugh <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] Motion control cards > > On 24 April 2011 15:39, Robert Pabon <[email protected]> wrote: > >> http://www.copleycontrols.com/motion/pdf/7225ac.pdf >> What they are doing is using two analog +-10v to represent the current >> command for the u and v and then they >> are synthesizing w either 120 or 90 degrees apart. > > Why do they do these strange things? > >> This seems pretty doable assuming using something like the 5i20 than a 7i33 >> card. > > Indeed. The bldc component outputs individual UVW amplitudes, you > would just ignore the W.
For bare Hbridges the U/V/W are offset so that 0 drive means all PWMS are set to 50%. Does the BLDC component set this offset or is it in TPPWM? Also if you have more tha 2 axis you would probaly want a 7I48 as you need 2 analog outputs per axis > > I still think an 8i20 would be cheaper and easier. (except for needing > an external PSU) > > -- > atp > "Torque wrenches are for the obedience of fools and the guidance of wise men" > > ------------------------------------------------------------------------------ > Fulfilling the Lean Software Promise > Lean software platforms are now widely adopted and the benefits have been > demonstrated beyond question. Learn why your peers are replacing JEE > containers with lightweight application servers - and what you can gain > from the move. http://p.sf.net/sfu/vmware-sfemails > _______________________________________________ > 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. ------------------------------------------------------------------------------ Fulfilling the Lean Software Promise Lean software platforms are now widely adopted and the benefits have been demonstrated beyond question. Learn why your peers are replacing JEE containers with lightweight application servers - and what you can gain from the move. http://p.sf.net/sfu/vmware-sfemails _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
