What's wrong with my VPI motor?

does the motor vibrate and not turn? the switch may be at fault. BUT, when i got the SDS i had to "crank up the voltage" (the old plc-2 i had worked great!)
to get the motor to start. but when i plugged the motor directly into the wall it worked flawlessly. vpi sent me a resistor/capacitor or something for free IF i wanted to dis-assemble the (huge)
motor, but i decided to go with the "noisier" start up voltage instead (84V?). definitely get some talc and treat the belt 1st. then e-mail vpi- they're pretty nice about addressing these quirky problems.

once again, anyone with the sds experiencing this problem should get out the sds manual, and follow the calibration instructions on increasing the voltage (to 84V). i was really worried at first when the motor vibrated but "locked up". but w/the 84v boost, i've had no further problems. however, i still wish i was brave enough to go inside the motor and install the new capacitor. (vpi says it's "easy").