2011/9/30 andy pugh <bodge...@gmail.com>: > On 30 September 2011 19:41, Viesturs Lācis <viesturs.la...@gmail.com> wrote: > >> Is there any chance that I have to set something that is not 8? That >> Keling's spreadsheet says that motor has 8 poles. > > With the motor in 0 mode and frequency 0 with low current you should > be able to turn the motor by hand and feel the poles. > (Actually, the docs say to use "n" not "0" for dumb-mode., so cfg=n,n,n) > 4 notches = 8 poles. >> >>> Also, there is a 50% chance that the bldc.N.scale needs to be a >>> negative number. >> >> Does not work with or without "-" sign in front of the scale value. > > It could still be the wrong Hall pattern then. You say that 4 of them worked? > It uses which transition it is to infer the angle, if the transition > sequence isn't quite right, then it won't work. > > You could try qhi, it is probable that the encoder index is at motor zero.
Incredible! I found 2 notches, so decided for 4 poles, added "minus" for scale and motor now turns smoothly and silently also with cfg=qh,qh,qh What should be my next step? Installing motor in machine and trying to tune PID loop? I tried assigning bldc.2.value to motor.2.pos-cmd and then tried to jog it - it starts turning and does not stop until I press F2. Viesturs ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
