5 ADVANCED SYNCHRONOUS CONTROL INITIAL POSITION
5.3 Cam Axis Position Restoration Method
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5
• The search fails. (Pattern 2)
When the cam axis position value per cycle restoration is executed in a cam stroke range that straddles 0[degree]
Restore the position value within the cam stroke range of 0 to less than 360[degree].
■With a feed operation cam pattern
• Search from "Cam axis position value per cycle = 0". (Cam data starting point = 0)
• Search from a value in the middle of the cam axis position value per cycle. (Cam data starting point = 0)
0
-180degree
180degree
360degree
Cam axis command position value
(Command position value)
Cam axis position value per cycle
Cam reference position
When the cam stroke range straddles 0
degrees and the unit is degree,
"Cam axis position value per cycle restoration
disable" (error code: 1E78H) occurs since
the command position value is within the
range of 0 to 359.99999 and the cam axis
position value per cycle is restored as the
dotted line position.
Cam stroke range
0
180degree
360degree
Cam axis command position value
(Command position value)
Cam axis position value per cycle
Cam reference position
Cam stroke range
Cam axis command position value
(Command position value)
Cam axis position value per cycle
Cam reference position
Search from "Cam axis position value per cycle=0".
Restored to the first command position value that matches.
(Other values are not restored.)
[Pr.468] Cam axis position value per cycle (Initial setting)
Cam axis command position value
(Command position value)
Cam axis position value per cycle
New cam reference position
current value
Cam reference position
at the start of restoration
Search from the value in the middle
and restore to the first command position
value that matches in the next cycle.
Update the cam reference position
in the next cycle automatically.
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