Restart Operation Of Cam Control - Mitsubishi Electric MELSERVO-MR-J4 GF Series Instruction Manual

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.
Main shaft/driven shaft
Servo-on
Controlword bit 4
(New set-point)
Point table No.
Main shaft
Command speed
Command position
Driven shaft
Controlword bit 4
(New set-point)
Control DI 2 bit 5
Command speed
Command position
Cam axis one cycle
current value
Cam axis feed current value
Status DO 2 bit 5
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
5 ms or longer
1
3 ms or shorter
Forward
Point table No. 1
rotation
0 r/min
Reverse
rotation
*1
ON
OFF
3 ms or shorter
Forward
Point table No. 1
rotation
0 r/min
Reverse
rotation
*1
*1
*1
ON
5 ms or shorter
OFF
Point table in which the command
position 0 is set as the target position
2
Positioning to the synchronization
start position (Command position 0)
Positioning to the synchronization
start position (Feed current value 0
(= Command position 0))
If the cam control stops during
operation, the synchronous position
relationship with the main shaft is
broken.
9 MANUFACTURER FUNCTIONS
9.5 Simple cam function
9
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