| 摘要 |
The main spindle (1A) for the main spindle device of a diesinker electric discharge machine is connected to a high rotor inertia, high output servo motor (15) without passing through a speed reducer; the servo motor (15) is equipped with a high resolution encoder (14). A main spindle rotation speed detection signal is detected by the encoder (14) when the main spindle (1A) is rotating in the high speed mode, and a main spindle angle position and rotation speed detection signal are detected when the main spindle (1A) is being angle divided, and these signals are fed back to the servo motor (15) motor driver (16). High speed rotational control and angle position precision angle division control are accomplished by a single servo motor and a single encoder.
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