On Sun, 16 Dec 2012, Viesturs L?cis wrote: > Date: Sun, 16 Dec 2012 11:57:02 +0200 > From: "[UTF-8] Viesturs L?cis" <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: "Enhanced Machine Controller (EMC)" <[email protected]> > Subject: Re: [Emc-users] 5i23 and 7i39 mystery > > 2012/12/14 sam sokolik <[email protected]>: >> what does the rs422-->rs232 convert do exactly? > > Encoder provides differential signal, so that boards converts it to > TTL for 7i39 card. > > Yesterday I was able to make some progress and now there is one error > that I have no explanation for: > > Motor no 1 turns ok with bldc cfg=h and bldc.1.value = 0.15 > When I add cfg=qh, motor oscillates, but encoder reports that it is > turning at pretty high velocity. > If I disable pwmgen and simply turn the motor by hand to check, then > it counts all the pulses correctly - approximately 4000 pulses in each > direction, it increments or decrements rawcounts pin correctly as the > motor is turned in different directions. I tried to move it as fast as > I can with hand back and forth and then placed it approximately as it > was and the rawcounts number was approximately the same, so I could > not get any evidence that any encoder pulses would be skipped or > something else would be wrong. But the motor does not turn. I tried > smaller number for bldc.value, but the only difference is that the > amplitude of oscillation was smaller. > > Can anyone share some ideas, what else can I try? > > -- > Viesturs > > If you can't fix it, you don't own it. > http://www.ifixit.com/Manifesto
I would check the encoder quadrature error flag. If its true you probably have an encoder interface/noise problem. > > ------------------------------------------------------------------------------ > LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial > Remotely access PCs and mobile devices and provide instant support > Improve your efficiency, and focus on delivering more value-add services > Discover what IT Professionals Know. Rescue delivers > http://p.sf.net/sfu/logmein_12329d2d > _______________________________________________ > 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. ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
