5 ADVANCED SYNCHRONOUS CONTROL INITIAL POSITION
5.3 Cam Axis Position Restoration Method
151
5
Example
The following shows an example of restarting the cam (a cam similar to a cam with a linear feed where two identical
positioning points do not exist on the cam) from the command position value after a forced stop, when the forced stop has
stopped operation.
If the following settings are used in a two-way cam or a cam where identical positioning points exist on the same cam, similar
to the cam axis position value per cycle restoration operation(Page 148 Cam axis position value per cycle restoration
operation), the first matching command position value (outward route) is restored, therefore restoration may start from an
unintended cam pattern position. To avoid restoring the first matching command position value, use "Cam axis command
position value restoration (Page 154 Cam axis command position value restoration)".
• Advanced synchronous control operation
• Restore operation at restart of advanced synchronous control
• Cam operation
Setting item Setting value
[Pr.439] Cam axis length per cycle 1000[pulse]
[Pr.441] Cam stroke amount 200[pulse]
[Pr.462] Cam axis position restoration object 0: Cam axis position value per cycle restoration
[Pr.463] Setting method of cam reference position 1: Initial setting value of cam reference position
[Pr.464] Setting method of cam axis position value per cycle 0: Previous value
[Pr.467] Cam reference position (Initial setting) 0[pulse]
[Pr.468] Cam axis position value per cycle (Initial setting) 0[pulse]
0
123
Command position value[pulse]
Time[ms]
Command position value after free run
Forced stop occurred during operation, and the cam decelerates to a stop. (Advanced synchronous control mode is cancelled.)
Cam is determined to restart at the position where cam axis
position value per cycle is "Command position value = 123[pulse]".
Cam reference position
= 0[pulse]
0
123
1000
200
Command position value[pulse]
Time[ms]
Cam axis position
value per cycle[pulse]
Time[ms]
0
0
123
1000
200 (peak)
Command position value[pulse]
Time[ms]
Cam axis position
value per cycle[pulse]
Time[ms]
Cam operation restarts from "Command position value = 123[pulse]"
when the previous forced stop occurred.
0
To Next Page
Loading...
