Cam Reference Position Restoration - Mitsubishi Electric RD77MS2 User Manual

Cam reference position restoration

If "[Pr.462] Cam axis position restoration object" is set to "1: cam reference position restoration" when starting synchronous
control, the cam reference position is restored based on the cam axis current value per cycle and the cam axis feed current
value.
Select the method for the cam axis current value per cycle to be restored. The feed current value when starting synchronous
control is used as the cam axis feed current value.
[Pr.464] Setting method of cam axis
current value per cycle
0: Previous value
1: Initial setting value of cam axis
current value per cycle
2: Current value per cycle
after main shaft gear
3: Current value per cycle
after auxiliary shaft gear
[Md.20] Feed current value
(At synchronous control start)
Cam axis current value per cycle
Cam axis feed current value
Cam reference position
Example
The following shows an example of restoring the cam reference position to start operation from a point (the feed current value
and the cam axis current value per cycle are 0) in the cam when the cam data starting point is not 0.
Cam axis current value per cycle
Cam axis feed current value
Cam reference position
5 SYNCHRONOUS CONTROL INITIAL POSITION
116
5.3 Cam Axis Position Restoration Method
[Md.407] Cam axis current
[Md.409] Cam axis feed
Restored by the equation of "Feed current value - Cam axis current value per cycle"
0
0
value per cycle
current value
Cam data
starting point
Cam data
The cam reference position is restored
based on the cam axis current value per
cycle and the cam axis feed current value.
[Md.408] Cam reference position