See below... On 7/5/2013 11:45 AM, Viesturs Lācis wrote: > Hello! > > I am stuck with a servo motor issue that I have no idea for the cause. > Machine has 5i23 and 2x 7i39 cards with total of 4 servo motors. > I set it up 2 months ago and it was working correctly. Machine was idle for > few weeks until now. > Motors 0, 1, 2 are working correctly, motor 3 does not move, pid 3 gets > reaches its max value as soon as I try to jog the motor. > > 1) I swapped motor and feedback cables of motor 2 and motor 3 (they are on > the same 7i39 board). Problem moved with the motor, so 7i39 board is fine. > > 2) I attached motor 0 to motor 3 cables on machine, motor 0 did not work; I > attached motor 3 to motor 1 cables, motor 3 worked correctly; both of these > things tell that problem is somewhere in motor wires; > > 3) so I took multimeter, and checked motor power cable between motor plug > and 7i39 plug - all the lines are where they are supposed to be; Checking that every pin goes where it belongs is necessary, but not sufficient. You must also test that no pin goes where it doesn't belong. Did you check to see if any pins were shorted to each other?
Ken > > 4) I tried to spin the motor in "bldc config=n" with bldc.value 0.15 and > bldc.frequency explicitly set at 0,15 and 3 respectively (motor should > slowly rotate as soon as pwmgen is enabled), but it moves just a very > little and stops; > > The drive is ok, motor is ok, cable is ok, but now they are not working > together. Everything was fine few weeks ago. > > I would appreciate any suggestions, what else can I try to understand, what > exactly is wrong. > ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
