Mitsubishi Electric QD77MS User Manual page 182

(c) Search from a value in the middle of the cam axis current value per cycle.
(Cam data starting point  0)
Cam axis current value per cycle
Cam axis feed current value
(Feed current value)
New cam reference position
Cam reference position
at starting the restoration
(d) The first search is fails and a search begins for the second time.
Cam axis current value per cycle
Cam axis feed current value
(Feed current value)
New cam reference position
Cam reference position
at starting the restoration
POINT
If the first search fails, a second search may not be processed on the next cycle for
a cam pattern with a feed stroke that is smaller than 100% of the stroke as above.
The intended cam axis current value per cycle can be found in the first search, by
setting or positioning the cam reference position in advance.
Chapter 5 Synchronous Control Initial Position
Pr.468 Cam axis current value per cycle
(Initial setting)
Cam data
Update the cam reference
starting point
position in the next cycle
automatically. (Update the
cam data on 0th point.)
Once the restoration fails in the first search, the new cam reference
position is automatically updated to set "Feed current value - New cam
reference position" to be within the feed stroke amount, and the search
process starts again.
5 - 14
Search from the value
in the middle.
Restore to the first feed
current value that matches.
Feed stroke
Restore to the first feed
current value that is found
in the second search.