Chapter 4
4-29
Operation
4-7-3 Torque Limiting
■ Functions
• The torque limit function limits the Servomotor’s output torque.
• This function can be used to protect the Servomotor and mechanical system by preventing exces-
sive force or torque on the mechanical system when the machine (moving part) pushes against the
workpiece with a steady force, such as in a bending machine.
• The steady force applied during normal operation is limited with user parameters Pn402 (forward
torque limit) and Pn403 (reverse torque limit).
■ Parameters Requiring Settings
● Limiting the Steady Force Applied during Normal Operation
Note 1. Set these parameters to 350 (the default setting) when the torque limit function is not being
used.
Note 2. If the connected Servomotor is set to a value greater than the maximum momentary torque,
the maximum momentary torque will become the set limit.
4-7-4 Electronic Gear Function
■ Functions
• This function rotates the Servomotor for the number of pulses obtained by multiplying the command
pulses by the electronic gear ratio.
• This function is enabled under the following conditions.
When fine-tuning the position and speed of two lines that are to be synchronous.
When using a position controller with a low command pulse frequency.
When you want to set the travel distance for machinery per pulse to 0.01 mm, for example.
Note If function switch 6 is OFF to enable the function switch settings, this parameter is ignored and
the setting on function switches 4 and 5 (resolution setting) is used.
Parameter No. Parameter name Explanation
Pn402 Forward torque
limit
Set the output torque limit for the forward direction as a percentage of
the rated torque (setting range: 0% to 800%).
Pn403 Reverse torque
limit
Set the output torque limit for the reverse direction as a percentage of
the rated torque (setting range: 0% to 800%).
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