Torque Limit Function - Mitsubishi MELSEC QD75P User Manual

12 CONTROL SUB FUNCTIONS

12.4.2 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
OPR
control
Major
positioning
control
Manual
control
: Set when required (Set to " – " when not used.)
– : Setting not required (Setting value is invalid. Use the initial values or setting values
: Shows the torque limit value when "
[1] Relation between the torque limit function and various controls
[2] Control details
[3] Precautions during control
[4] Setting the torque limit function
The following table shows the relation of the "torque limit function" and various
controls.
Control type
Machine OPR control
Fast OPR control
1-axis linear control
2 to 4-axes linear
interpolation control
Position 1-axis fixed-feed control
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
Current value changing
Other
JUMP instruction, NOP
control
instruction, LOOP to
LEND
JOG operation, Inching operation
Manual pulse generator operation
within a range where no error occurs.)
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Torque limit
function
–
–
Cd.22 New torque value" is set to "0".
12 - 23
MELSEC-Q
Torque limit value
Pr.17 Torque limit setting value
After the " Pr.47 Creep
speed" is reached, this value
Pr.54
becomes the " OPR
torque limit value".
Pr.17 Torque limit setting value
Setting value is invalid.
Pr.17 Torque limit setting value
Pr.17 Torque limit setting value