초록 ▼

Disclosed is a control method in which control errors, attributable to a change of the state of a transmission mechanism, disposed between a servomotor and a load driven thereby, are reduced in controlling a driving force to be applied to the load. A detected value (PH) of the driving force applied

Disclosed is a control method in which control errors, attributable to a change of the state of a transmission mechanism, disposed between a servomotor and a load driven thereby, are reduced in controlling a driving force to be applied to the load. A detected value (PH) of the driving force applied actually to the load is compared with a set value (PL′) of the force to be applied to the load. The driving current of the servomotor is controlled in accordance with the result of such comparison. Thereupon, a change of the correlation between the servomotor output and the driving force applied actually to the load, which is attributable to the change of the state of the transmission mechanism, is compensated automatically. Thus, the driving force applied actually to the load is adjusted accurately to the set value.

대표청구항 ▼

A method of controlling the output torque of a servomotor by adjusting the driving current of the servomotor to be less than or equal to a limited value by torque limiting means, a torque control method for the servomotor comprising the steps of: (a) detecting a driving force actually applied to a l

A method of controlling the output torque of a servomotor by adjusting the driving current of the servomotor to be less than or equal to a limited value by torque limiting means, a torque control method for the servomotor comprising the steps of: (a) detecting a driving force actually applied to a load, through a transmission mechanism, by the servomotor, a relation between the actually applied driving force and the output torque being permitted to vary due to a change in the condition of the transmission mechanism; (b) comparing a detected value of the driving force with a set value of the driving force to be applied to the load; and (c) driving the torque limiting means in accordance with the difference between the detected value and the set value, for controlling the driving current of the servomotor, thereby adjusting the driving force actually applied to the load to the set value by feedback control, a change in the relation between the actually applied driving force and the output torque can be automatically compensated when the change occurs.