3. SCON-CA/CF
A
138
Target position
Travel
Speed
Position where the actuator is pushed against the
work part and the pressing completion is judged so
the positioning completion signal is turned “ON”
Range where the TRQS signal is output.
Positioning band (max. pressing level)
(27) Torque level (TRQS) PLC input signal
This signal is available only in the pressing operation.
When the motor current reaches the load threshold during the pressing operation (moving up to the
positioning band), this signal is turned “ON”.
Because the current level is monitored, when the current level is changed, this signal is turned “ON” or
"OFF.”
The speed available for the pressing varies depends on the motor and leads, it is required to adjust the
parameters.
x
Set the pressing speed using the parameter No. 34 “Pressing Speed”.
When the machine is delivered, it has been individually set depending on the actuator characteristics.
Set an appropriate speed considering the work part material and shape.
x
Set the parameter No. 50 “Load Output Judgment Time Period”.
x
Set the parameter No. 51 “Torque Inspected Range” to “1” (disable).
x
Set the threshold using the PLC's Load Current Threshold Register.
x
Set the positioning band using the PLC's Positioning Band Register.
Set it a bit longer from the backmost position considering the mechanical dispersion of the work part.
Refer to the operation manual for the controller for more information.
Caution:
x
If the actuator pushes against the work part before the target position, it is regarded as a
servo-motor error.
Take care of the positional relationship between the target position and the work part
position.
x
The actuator continues to push the work part with the pressing current at the stop time
decided with the current-limiting value.
It is not the stop condition, so take the greatest care to deal with it.
