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Chapter 13 Control Sub Functions
13.4.2 Torque limit function
The "torque limit function" limits the generated torque to a value within the "torque limit
value" setting range when the torque generated in the servomotor exceeds the "torque
limit value".
The "torque limit function" protects the deceleration function, limits the power of the
operation pressing against the stopper, etc. It controls the operation so that
unnecessary force is not applied to the load and machine.
The details shown below explain about the "torque limit function".
[1] Relation between the torque limit function and various controls
[2] Control details
[3] Precautions during control
[4] Setting the torque limit function
[1] Relation between the torque limit function and various controls
The following table shows the relation of the "torque limit function" and various
controls.
Control type
Torque limit
function
Torque limit value *
OPR
control
Machine OPR control
"[Pr.17] Torque limit setting
value" or "[Cd.101] Torque
output setting value".
: After the "[Pr.47] Creep
speed" is reached, this value
becomes the "[Pr.54] OPR
torque limit value".
Fast OPR control
"[Pr.17] Torque limit setting
value" or "[Cd.101] Torque
output setting value".
Major
positioning
control
Position
control
1-axis linear control
2 to 4-axes linear
interpolation control
1-axis fixed-feed control
2 to 4-axes fixed-feed
control (interpolation)
2-axis circular interpolation
control
1 to 4-axes speed control
Speed-position switching control
Position-speed switching control
Other
control
Current value changing –
Setting value is invalid.
JUMP instruction, NOP
instruction, LOOP to LEND
–
Manual
control
JOG operation, Inching operation
"[Pr.17] Torque limit setting
value" or "[Cd.101] Torque
output setting value".
Manual pulse generator operation
Expansion
control
Speed-torque control
Torque limit value before
switching control mode is
continued.
: Set when required (Set to " – " when not used.)
– : Setting not required (The setting value is invalid. Use the initial value or a value
within the setting range.)
: Shows the torque limit value when "[Cd.22] New torque value/forward new torque
value" or "[Cd.113] Reverse new torque value" is set to "0".