Hi every one I have the drive and motor are of kollmorgen / inland motors
Machine : Harding Lathe
Model: CHNC4
Spindle Drive: HPA03-158100-611-5306B35
Serial : 4M-405
Spindle Motor: TTBH5306-425-B
Serial No.: 84K72-275
The Problem is that motor is giving a humming noise and at high speed there is vibration. We have checked the motor by giving external power Motor is fine no sound. Then we checked the current input of spindle drive. the Voltage are same but the current varies alot on one wire it reads 25 amps, second it is 12 amp and third is 2 amp. can you suggest please where the problem lies and its solution. thanks its is urgent