Kirk Wallace wrote: > I have started work on my Bridgeport mill. I jury rigged a Sanyo P5 1kW > motor with a Rutex amp to get an idea about if it will work. I can get > it to move, but at times during the motion it pulses at about four times > a second, or stalls with a jerk at the pulse timing. Sometimes it will > even reverse direction for a while. I have a fair amount of noise on the > encoder lines that seem to be from the motor R, S, T lines. I am now > working at solving the noise problems by checking grounds, shielding and > ferrite beading, but I got to thinking about the hall encoder and motor > lines. Will the motor function at all if I wire the Halls out of sync > with the motor lines? No. It will either jump wildly or have a dead spot where no command will cause it to move. My guess is, not even close, but if so, is there a > way to figure out how to correct it? There are only a few possible ways to connect 3 wires. If my combinatorics is not totally lost, it is 6. Another symptom is, at idle I get a > smooth increasing torque when I manually deflect the motor shaft in one > direction, and a weaker torque and pulsing by deflecting the motor shaft > in the other. As always, I am grateful for any advise.
This may or may not be a symptom of anything. The Hall or commutation sensors have to be properly aligned with the motor windings and connected with the right phase relationship to the drive logic. Then, the drive has to be expecting the polarity and meaning of the commutation sensors to match what it is getting. This pulsing 4 times a second, is that independent of motor speed? That would be really odd. If it pulses at the commutation points, it may indicate the commutation sensors are not aligned or connected right. Jon ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
