618 Horizontal Boring Machine Circuit Diagram and Working Principle
A. Reversing the spindle motor forward and reverse by the contactor KM1, KM2 main contact to complete the power phase sequence changes, to change the motor steering.
Interlock contact KM1 (27-29) is disconnected to achieve interlocking of contactor KM2.
Press the forward start button SB2, the contactor KM1 coil (1-9-11-13-15-17-19-21-6-2) is energized and its self-locking contact KM1 (17-23) is closed,
Control of the main motor M1 The control of the spindle motor M1 has high speed and low speed movement, forward and reverse, jogging and variable speed impulse.
