9 MANUFACTURER FUNCTIONS
9.5 Simple cam function
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9
Restart operation of cam control
When the cam control is stopped during operation, a gap may be generated in the synchronous position relationship between
the main shaft and the driven shaft. To solve the gap, return the main shaft and the driven shaft to the synchronization starting
point and then start the synchronous operation.
The above shows an example for when the synchronization starting point is the point where both command position and feed
current value are "0".
ON
OFF
ON
OFF
ON
OFF
ON
OFF
*1
1
2
*1
*1
*1
Controlword bit 4
(New set-point)
Control DI 2 bit 5
Status DO 2 bit 5
0 r/min
0 r/min
Controlword bit 4
(New set-point)
Main shaft/driven shaft
Servo-on
Point table in which the command
position 0 is set as the target position
5 ms or longer
Point table No.
3 ms or shorter
Main shaft
Positioning to the synchronization
start position (Command position 0)
Point table No. 1
Forward
rotation
Command speed
Reverse
rotation
Command position
Driven shaft
3 ms or shorter
Positioning to the synchronization
start position (Feed current value 0
(= Command position 0))
Point table No. 1
Forward
rotation
Command speed
Reverse
rotation
If the cam control stops during
operation, the synchronous position
relationship with the main shaft is
broken.
Command position
Cam axis one cycle
current value
Cam axis feed current value
5 ms or shorter