| 摘要 |
PROBLEM TO BE SOLVED: To constantly maintain a torque constant of a servo motor, by correcting a torque command being outputted from a speed control loop via a torque correction circuit using a correction torque, and passing the command to a current control loop. SOLUTION: A torque command - output torque relation data part 22 actually drives a servo motor and measures and obtains an actual output torque for the torque command. Then, when the relationship is expressed by the form of table data, a torque command Tc1 or the like before correction is inputted as a parameter, and data for obtaining a correction torque command Tc2 by using the parameter and correcting the torque command Tc11 are read from a memory and are outputted to a torque command correction means 21. The torque command correction means 21 receives data for correcting torque from the torque command - output torque relationship data part 22, corrects the torque command Tc1 before correction based on the data, and forms a correction torque command Tc2 and passes it to a current loop. |
