Motor control device, machining system, motor control method, and machining method

A motor control method for a motor control device to generate, on a basis of an acceleration time constant that defines an acceleration time of a drive shaft and a deceleration time constant that defines a deceleration time of the drive shaft, a control signal for a motor that drives the drive shaft, the motor control method comprising:

• a synchronous operation command extraction of extracting, from within a machining program, blocks where set-point control is to be continuously commanded for a plurality of the drive shafts that synchronize and extracting synchronous operation commands included in the blocks;
• an operation state computation of computing, on a basis of the acceleration time constant and the deceleration time constant, an operation time and consumption energy that are associated with machining to be performed with the machining program;
• an optimum parameter computation of computing, for each of the synchronous operation commands, the acceleration time constant and the deceleration time constant that result in the operation time of the drive shaft being within an allowable operation time and the consumption energy being minimum as optimum parameters, the allowable operation time representing an allowable time for operation;
• and
• a motor control of generating a control signal for the motor on the basis of the optimum parameters.

A machining method for a machining system to generate, on a basis of an acceleration time constant that defines an acceleration time of a drive shaft and a deceleration time constant that defines a deceleration time of the drive shaft, a control signal for a motor that drives the drive shaft and perform machining, the machining system including a motor control device and a machining apparatus including the motor to be controlled by the motor control device, the machining method comprising:

• a synchronous operation command extraction of extracting, from within a machining program, blocks where set-point control is to be continuously commanded for a plurality of the drive shafts that synchronize and extracting synchronous operation commands included in the blocks;
• an operation state computation of computing, on a basis of the acceleration time constant and the deceleration time constant, an operation time and consumption energy that are associated with machining to be performed with the machining program;
• an optimum parameter computation of computing, for each of the synchronous operation commands, the acceleration time constant and the deceleration time constant that result in the operation time of the drive shaft being within an allowable operation time and the consumption energy being minimum as optimum parameters, the allowable operation time representing an allowable time for operation;
• a motor control of generating a control signal for the motor on the basis of the optimum parameters;
• and
• a machining of performing the machining through operation of the motor in accordance with the control signal.