Servo control device

A servo control device for a motor configured to drive a drive shaft of a machine tool or a drive shaft of an industrial machine, the servo control device comprising:

• a control unit configured to control driving of the motor based on a movement command;
• and
• a backlash amount measurement unit configured to measure an amount of backlash that occurs when the drive shaft is reversed,
• the backlash amount measurement unit comprising
• a reverse detection unit configured to detect a start of reverse of the drive shaft, based on a position command, a speed command, a position detection value, or a speed detection value,
• an arrival detection unit configured to detect arrival of the drive shaft at a backlash end after the start of reverse, based on a position command, a speed command, a position detection value, or a speed detection value, and
• a time/distance measurement unit configured to measure a period of time or a movement distance from detection of the start of reverse by the reverse detection unit to detection of the arrival at the backlash end by the arrival detection unit.