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champ1981

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  1. Can anyone confirm the correct feeder stepper motor for the UM2. I have a failed stepper motor, so i removed the original which had the following part number on it SY42STH47-1684AW I was unable to get this part number, but found the following part number from a company called Zapp SY42STH47-1684A I got one of these and replaced the old one. The motor now works, but runs very fast, I would guess at twice the speed. Does anybody know whats happened, have a replaced with an incorrect part? Why would the motor runs so fast. Any advice appreciated.
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