2012/12/14 andy pugh <bodge...@gmail.com>: > On 14 December 2012 20:19, Viesturs Lācis <viesturs.la...@gmail.com> wrote: > >> For example, today I started the system up, all 4 motors had set >> bldc.value = 0.15; motors 0 and 1 were spinning, 2 and 3 were standing >> still. I tried to get them spinning too by changing bldc cfg=h and >> later also to cfg=n. Well, those motors started to turn, but 0 and 1 >> did not. Even more - turning them by hand did not reflect any change >> in encoder.0.rawcounts and in encoder.1.rawcounts. > > Were 0 and 1 running on the Hall sensors or on the encoder when they > were working?
0 was cfg=h, 1 was cfg=qh; After both of them stopped responding, I tried also swapping the motors with no success. BTW there is one more unknown thing: Motors have 1000 CPR encoders. If I turn motor one turn in one direction, rawcounts pin increments approximately by 4000, if I turn it one turn in opposite direction, it also increments by different number (it is changing, mostly in 2000-3000 range). Since both of the phases are connected to 7i39, it is obviously an error somewhere. I see 2 possible places: motor itself (I do not trust those chinese manufacturers) and my rs422-->rs232 convertor board. I made a testing cable to attach motor directly to 7i39 to bypass my convertor - eliminating it from the signal path would indicate where the problem is. The thing is that then LinuxCNC does not report any signal received at all. The cable was checked and it is ok. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
