2012/12/6 Peter C. Wallace <[email protected]>: > On Thu, 6 Dec 2012, Viesturs L?cis wrote: > >> Date: Thu, 6 Dec 2012 21:29:35 +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: [Emc-users] 7i39 error >> >> Hello! >> >> First channel on 7i39 card is not spinning motor - motor just >> oscillates on place. Connecting the motor to other channel makes to >> turn correctly. >> >> I checked the wiring with multimeter, it was ok. >> I tried also with bldc cfg=h and with cfg=n, it just does not spin, >> but it did in the morning with cfg=h, which made me think that there >> is a problem with encoder signal. >> >> I would appreciate any suggestions on possible cause of problem. > > > I would verify the encoder and flat cable first > > another test is to disconnect the PID loop, set a small output voltage (bldc > value = .1 or so) and slowly change the angle. > > You can also verify the 3 phase 7I39 outputs with a trio of red/green LEDS > with about 2K series resistors
I do not have any motor connected to PID yet, all the bldc instances have setp value 0.15 When I tried with cfg=n, I had set the frequency = 2. I suspect that 7i39 card is damaged. Regarding that I have a question about attaching/detaching motor and some voltage applied to motor power terminals - what is likelihood to damage the card, if I plug/unplug motor, when transformer of power supply is switched off, but there is still a charge in filtering capacitors. -- 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
