Q: We bought GSK218MC-H CNC system, including 2 isolating transformers with 220V/3phase outputs, the 3 feeding axes DAT2100, input power is 220V/3phase, but the spindle drive GS3150Y-NP2 requires input power 380V/3phase, is this wrong that one isolating transformer should output 380V/3phase for the spindle?

A: The GS3150Y-NP2 requires 380V/3phase can be directly from your power supply, no need through the isolating transformer.

GS3150Y specification:

http://www.cncmakers.com/cnc/controllers/Spindle_Motor_Driver/AC_Servo_Spinle_Unit.html