Method To Restart Synchronous Control - Mitsubishi Electric QD77MS User Manual

5.6 Method to restart synchronous control

The relationship of the synchronous position for synchronous control is always saved in the
Simple Motion module. Synchronous control can be restarted without returning all axes to
their starting points by restoring the synchronized relationship through the synchronous
control initial position parameters (Refer to Section 5.2).
The reference axis used to restart synchronous control is different for each system. The
following procedure shows an example of how to restore synchronized values based on the
servo input axis as reference position.
Example
Restoring 2 output axes (axis 2, axis 3) based on the servo input axis (axis 1) as the
reference position.
(Press conveyance device)
(1) Procedure for synchronous control (first time)
Y axis of
workpiece
conveyance
(Axis 3)
1) Execute OPR for axis 1, 2 and 3, and position to the synchronization starting
point.
2) Set the synchronous control initial position parameters for axis 2 and 3 as follows.
Setting item
[Pr.460] Setting method of current value per
cycle after main shaft gear
[Pr.462] Cam axis position restoration object
[Pr.463] Setting method of cam reference
position
[Pr.468] Cam axis current value per cycle (Initial
setting)
3) Turn ON the bits for axis 2 and 3 in "[Cd.380] Synchronous control start" to start
synchronous control.
Chapter 5 Synchronous Control Initial Position
Pressing
position
(Axis 1)
Axis 1
X axis of
workpiece
conveyance
(Axis 2)
5 - 33
Main
shaft
gear
Axis 1
Axis 2
Setting value
2: Calculate from input axis
0: Cam axis current value per cycle restoration
2: Feed current value
0
Main
shaft
gear
Axis 3