... 3A-1S CNC fully automatic pipe bending machine, with PLC control system, 3 servos for rotary and feeding and bending. Touch screen ... operation, can choose manual , semiautomatic and full automatic operation manual, portable pedal switch with start and emergency stop function. 2. multi ... study of malfunction with one set of tooling 8. All the parts of hydraulic system, control system, driver system and ...