i have a mori seiki mv 35/40 vertical mill and the spindle is doing goofy things, this machine ran fine until it was moved. we got it on the floor and installed a new encoder for the y axis on the back (a moron pushing a cart broke it), it homes out and comes up fine, but when you orient or try to give the spindle a command it jumps around as if it it fighting it self, it will turn on at the correct speed after a bit, but has no torque, i can grab the holder with my hand and make the load meter go over 120%, when you press the orient button it jerks back and forth, about half a revolution and the sensor is visible and if i grab the spindle and hold it on the sensor it will orient and the light will come on, but it will still try to move and the load meter still goes up and down. this is not a geared head it is dc, has a yasnac mx1 control/yaskawa electronics