Attention:This kind of machines, also called " Closed loop control Wire cut machines". The motor should be AC servo motor and with Servo drives. 

DC servo motor machines are same performance as stepper motor machines.

There are 2 types

1. Economical Type with Parallel frame design (F type) with BMW-3000 controller.

2. High performance types (C type designed frame) with BMW-5000 controller and Double direction Intelligent Auto wire tension system