Variable Speed Operation - Mitsubishi FX3U-20SSC-H User Manual

FX -20SSC-H Positioning Block User's Manual
3U
9.7

Variable Speed Operation

→ For details on the related parameters, control data, and monitor data, refer to Section 9.13
1. Operation
Speed
Select operation pattern
(variable speed operation)
Operation speed 1
Positioning completion
1) Set the operation speed 1 to a value other than 0.
2) Select the variable speed operation from the patterns to start the variable speed operation (above figure).
(The positioning completion signal is turned OFF.)
3) When selecting an operation pattern other than the variable speed operation, the work piece decelerates
to stop and the operation ends.
(Positioning completion signal remains OFF.)
Note
• When setting the operation speed to 0, the work piece decelerates to stop, but the variable speed
operation does not end.
The operation pattern should be changed to another pattern when terminating the variable speed
operation.
• At STOP command ON, the work piece decelerates to stop.
Note that the operation restarts at STOP command OFF.
2. Operation speed
The actual operation speed is "operation speed 1 x override setting."
3. Rotation Direction
The operation direction is decided by the sign of operation speed 1.
+: Operates in the direction which increases the current value.(Decelerates to stop when the value is 0.)
-: Operates in the direction which decreases the current value.
If the sign of the operation speed value changes, the reverse operation starts after decelerating to stop.
Caution
An abrupt change in the rotation direction may cause damage to the machine.
It may also cause an error through motor overload.
To change the rotation direction, set the operation speed 1 value to 0, and wait for the motor to stop
completely after decelerating to stop.
If the operation speed 1 value changes from positive to negative (e.g. 100 → -100), the work piece
decelerates to stop, and the 20SSC-H starts the reverse operation immediately.
92
→ For details on the operation speed change, refer to Section 7.6
Acceleration Time
Maximum speed
Operation
speed 1
2)
ON
OFF
1200 800
ON
OFF
→ For details on the torque limit, refer to Subsection 7.8.3
→ For details on the STOP command, refer to Section 7.4
Deceleration time
3)
OFF
0 400 1200
9 Positioning Control
9.7 Variable Speed Operation
ON
Time