| 摘要 |
PURPOSE:To provide a CNC grinding machine which can eliminate the transmission loss being clue to gears of driving force and improve synchronous accuracy by using a built-in motor as a driving motor for a machining spindle to directly couple a rotor with the machining spindle, and can dispense with a synchronous shaft to couple shafts by controlling the motor as a servo motor. CONSTITUTION:In a grinding machine having two machining spindles, a synchronous control device is composed of a phase error equipment 5 to set two motors M1, M2 at the same phase, a servo control device provided with a synchronous compensator actuated by the output of the phase error equipment, a current error equipment 6 to balance the load shares of the two motors M1, M2, and a current balance compensator actuated by the output of the current error equipment 6. |
