Hi every one,

can any body help me out to solve my problem.

I have one Sagem milling machine ,which has veriable speed spindle
but for some times it is not performing ,frequently one gear is breaking in gear box which is used for speed variation, we have tried many times by changing the gear but problem not solved hence i have converted it into VFD , and fix the gear at one position and change the speed by VFD.
But what happening now spindle is not taking load .every time when we start ,spindle run for some time and stops in between and current increased upto the limit and VFD shut off the supply.

Please help