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4.7
Torque limit
The torque limit function limits the torque generated by the servo motor.
The following torque limit can be set.
Item
Internal torque limit
Maximum torque limit 1
• When setting the torque above the maximum torque of the servo motor, the torque is limited by the
maximum torque of the servo motor.
• Servo parameters that are mapped to an object from the controller will overwrite those written from the
engineering tool.
Precautions
• If the torque limit is canceled during servo-lock, the servo motor may suddenly rotate, depending on the amount of the
position deviation from the command position.
• When using the torque limit, check that [Pr. PB06 Load to motor inertia ratio/load to motor mass ratio] is set properly.
Improper settings may cause an unexpected operation such as an overshoot.
• When [Pr. PA11 Forward rotation torque limit], [Pr. PA12 Reverse rotation torque limit], and [Pr. PE53 Maximum torque limit
1] are set to "0.0", no torque or thrust is generated.
4 APPLICABLE FUNCTIONS
180
4.7 Torque limit
Outline
The maximum torque is limited by the values of [Pr. PA11 Forward rotation torque limit] and [Pr.
PA12 Reverse rotation torque limit].
The maximum torque is limited by the value of [Max torque (Obj. 6072h)] according to the setting of
[Pr. PC78.1 Maximum torque limit 1 selection].
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