Mitsubishi Electric QD77MS User Manual page 183

Example
The following shows an example of restarting the cam (a cam similar to a cam with a linear
feed where two identical positioning points do not exist on the cam) from the feed current
value after a forced stop, when the forced stop has stopped operation.
If the following settings are used in a two-way cam or a cam where identical positioning
points exist on the same cam, similar to the cam axis current value per cycle restoration
operation (Refer to Section 5.3.1), the first matching feed current value (outward route) is
restored, therefore restoration may start from an unintended cam pattern position. To avoid
restoring the first matching feed current value, use cam axis feed current value restoration
(Refer to Section 5.3.3).
Setting item
[Pr.439] Cam axis length per cycle
[Pr.441] Cam stroke amount
[Pr.462] Cam axis position restoration object
[Pr.463] Setting method of cam reference position
[Pr.464] Setting method of cam axis current value per cycle
[Pr.467] Cam reference position (Initial setting)
[Pr.468] Cam axis current value per cycle (Initial setting)
• Synchronous control operation
Feed current value [PLS]
123
0
Forced stop occurred during operation, and the cam decelerates to a stop.
(Synchronous control mode is cancelled)
• Restore operation at restart of synchronous control
Feed current value [PLS]
200
123
Cam reference position
= 0 [PLS]
0
Cam axis current
value per cycle [PLS]
1000
0
Chapter 5 Synchronous Control Initial Position
1000 [PLS]
200 [PLS]
0: Cam axis current value per cycle restoration
1: Initial setting value of cam reference position
0: Previous value
0 [PLS]
0 [PLS]
Feed current value after free run
Time [ms]
Time [ms]
Cam is determined to restart at the position where cam axis
current value per cycle is "Feed current value = 123 [PLS]".
Time [ms]
5 - 15
Setting value