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Need Help! VMC 4020 88HS X-Y motors take jerk on startup

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Hi everyone..
I am new to fadal machines...
I am working on a fadal VMC 4020 with 88 HS control.
When we on the machine, all the motors X, Y, Z takes jerk on startup.
We removed motor of X axis and checked and found motor on startup moves a little clockwise and then CCW, which makes jerk the bed with sound.
Please help...

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