Cam Axis Position Restoration Method; Cam Axis Current Value Per Cycle Restoration - Mitsubishi Electric QD77MS User Manual

5.3 Cam axis position restoration method

5.3.1 Cam axis current value per cycle restoration

If "[Pr.462] Cam axis position restoration object" is set to "0: Cam axis current value per cycle
restoration" when starting synchronous control, the cam axis current value per cycle is
restored based on the cam reference position and the cam axis feed current value.
Select the method for the cam reference position to be restored. The feed current value when
starting synchronous control is used as the cam axis feed current value.
The cam axis current value per cycle is restored by searching for the corresponding value
from the beginning to the end of the cam pattern. Set the starting point from where to search
the cam pattern in "[Pr.468] Cam axis current value per cycle (Initial setting)". (It is also
possible to search the return path in a two-way cam pattern operation.)
Md.20 Feed current value
(At synchronous control start)
Pr.463 Setting method of
cam reference position
0: Previous value
1: Initial setting value of cam
reference position
2: Feed current value
Restrictions
(1) With two-way cam pattern operation, if the corresponding cam axis current value per
(2) When starting synchronous control, the feed current value may change slightly from
(3) With a feed operation cam pattern, if the corresponding cam axis current value per
(4) If the cam resolution is large, search processing may take a long time when starting
Cam axis current value per cycle
Cam axis feed current value
Cam reference position
cycle is not found, the error "Cam axis current value per cycle restoration disable"
(error code: 768) will occur and synchronous control will not be started.
its original position at starting synchronous control. This is due to the readjustment of
the position based on the restored cam axis current value per cycle. This does not
result in position displacement.
cycle is not found on the first cycle, the cam reference position is changed
automatically and the pattern is searched again.
synchronous control. (Cam resolution 32768: up to about 10ms)
Chapter 5 Synchronous Control Initial Position
Md.409 Cam axis
feed current value
Md.408 Cam reference
position
5 - 11
The cam axis current value per cycle is
restored based on the cam reference
position and cam axis feed current value.
Md.407 Cam axis current value per cycle
Search the cam pattern
(It is also possible to search
from the middle of the cam axis
current value per cycle.)