Cam Axis Position Restoration Method; Cam Axis Current Value Per Cycle Restoration - Mitsubishi Electric R32MTCPU Programming Manual

7.6

Cam Axis Position Restoration Method

Cam axis current value per cycle restoration

If "[Pr.462] Cam axis position restoration object (D15102+150n)" 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 current feed value.
Select the method for the cam reference position to be restored. The current feed value when starting synchronous control is
used as the cam axis current feed 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) (D15112+150n, D15113+150n)". (It is also possible to search the return path in a two-way cam pattern operation.)
[Md.20] Feed current value
(D0+20n, D1+20n)
(At synchronous control start)
[Pr.463] Setting method of cam
reference position
(D15103+150n)
0: Previous value
1: Initial setting value of cam
reference position
2: Current feed value
Cam axis current value per cycle
Cam axis current feed value
Cam reference position
Restrictions
• With two-way cam pattern operation, if the corresponding cam axis current value per cycle is not found, minor error (error
code: 1C28H) will occur and synchronous control will not be started.
• When starting synchronous control, the current feed value may change slightly from 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.
• With a feed operation cam pattern, if the corresponding cam axis current value per cycle is not found on the first cycle, the
cam reference position is changed automatically and the pattern is searched again.
• If the cam resolution is large, search processing may take a long time when starting synchronous control.
Number of axes
1
8
16
32
7 AUXILIARY AND APPLIED FUNCTIONS
144
7.6 Cam Axis Position Restoration Method
[Md.409] Cam axis current
feed value
(D13616+30n, D13617+30n)
[Md.408] Cam reference
position
(D13614+30n, D13615+30n)
Search the cam pattern
(It is also possible to search
from the middle of the cam axis
current value per cycle.)
Cam resolution
256
0.44[ms]
1.78[ms]
3.55[ms]
7.10[ms]
The cam axis current value per cycle is
restored based on the cam reference
position and cam axis current feed value.
[Md.407] Cam axis current value per cycle
(D13612+30n, D13613+30n)
32768
12.2[ms]
94.4[ms]
249[ms]
483[ms]