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MICROMASTER

Micromaster Eco Spindle Stalls

Thread Starter: utedenny   Started: 8/1/2012 7:13 AM   Replies: 1

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  8/1/2012, 7:13 AM
utedenny
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After receiving a run command, a  centrifugal pump motor spindle rotates approx. 180 degrees in the desired direction, and about 10% of the time stalls there. 
Most of the time the spindle  rotates approx. 180 degrees in the desired direction,  rotates backwards approx 60 degrees, 
then starts forward again and ramping  to desired speed reference set by an 4-20 mAanalog input.
A stall can also be forced at the 180 degree point by applying friction to the spindle at startup.
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  8/4/2012, 1:25 AM
Graeme
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utedenny wrote:
After receiving a run command, a  centrifugal pump motor spindle rotates approx. 180 degrees in the desired direction, and about 10% of the time stalls there. 
Most of the time the spindle  rotates approx. 180 degrees in the desired direction,  rotates backwards approx 60 degrees, 
then starts forward again and ramping  to desired speed reference set by an 4-20 mAanalog input.
A stall can also be forced at the 180 degree point by applying friction to the spindle at startup.


Strange!!
This sounds like the Flying restart function is searching for the rotor, is this function activated?
Has this problem just started, or always run like this?
Any mechanical problems, have you checked the current drawn at startup?
Just some ideas.
Regards,
Graeme
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