2012/12/20 Viesturs Lācis <[email protected]> > How do You mean checking the torque of unconnected motor? Simply > grabbing the motor shaft by hand and then deciding on the feeling? I > will try that in the morning when I will be back there. > > That would help. At least the motors should resist and go back.
> 2012/12/20 Andrew <[email protected]>: > Motors have a load - they are installed in the machine. Sometimes PID > gets saturated and runs away as soon as I touch jog button. Restarting > LinuxCNC solves the issue and I can jog motor normally. That might be wrong Hall pattern. > The thing I > have no explanation for is that if I try to jog it in positive > direction, it runs away into negative direction. I would see some > logic, if it moved in the same direction but now it does not make any > sense to me. > I am sure that bldc settings are correct - otherwise I would not be > able to spin those motors either with setting bldc.value or by > jogging. Bldc scale is -4000, because there are 1000 CPR encoders and > encoder rawcounts pin increases/decreases by 4000, if I do a full turn > of motor shaft by hand in one or another direction. I added the minus > sign, because it did not work otherwise. > I have set them as follows: > loadrt bldc cfg=qh,qh,qh,qh > setp bldc.n.scale -4000 > setp. bldc.n.poles 8 > setp bldc.n.pattern 25 > > I suggest you to set bldc scale positive (I have a feeling it's meant positive) and invert encoder scale instead. If that wont't work, try different Hall patterns. Also, are you sure about 8 poles? ------------------------------------------------------------------------------ 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
