Cam Axis Feed Current Value Restoration - Mitsubishi Electric iQ-F Series User Manual

Cam axis feed current value restoration

If "[Pr.462] Cam axis position restoration object" is set to "2: Cam axis feed current value restoration" when starting
synchronous control, the cam axis feed current value is restored based on the cam axis current value per cycle and the cam
reference position.
Select the method for the cam axis current value per cycle and the method for the cam reference position to be restored.
[Pr.464] Setting method of cam axis
current value per cycle
0: Previous value
1: Initial setting value of cam axis
current value per cycle
2: Current value per cycle
after main shaft gear
3: Current value per cycle
after auxiliary shaft gear
[Pr.463] Setting method of cam
reference position
0: Previous value
1: Initial setting value of cam
reference position
2: Feed current value
Cam axis current value per cycle
Cam axis feed current value
Cam reference position
The cam axis feed current value moves to its restored value just after starting synchronous control when the
cam axis feed current value to be restored is different from the feed current value at synchronous control start.
If the difference is larger than "In-position width (PA10)" of servo amplifier in pulse command units, the error
"Cam axis feed current value restoration disable" (error code: 1C29H) will occur and synchronous control
cannot be started.
Note that, if the setting value of "In-position width" is large, a rapid operation may occur.
With cam axis feed current value restoration, calculate the cam axis feed current value with the cam position
calculation function (Page 150 Cam Position Calculation Function) or with synchronous control analysis
mode (Page 148 Synchronous Control Analysis Mode) before starting synchronous control. Then start
synchronous control after positioning to the correct cam axis feed current value.
Example
The following shows an example of starting a cam pattern from the zero point of the cam axis current value per cycle with the
current feed current value position as the origin when returning to a specified point, or home position return is completed after
a forced stop.
Setting item
[Pr.439] Cam axis length per cycle
[Pr.441] Cam stroke amount
[Pr.462] Cam axis position restoration object
[Pr.463] Setting method of cam reference position
[Pr.464] Setting method of cam axis current value per cycle
[Pr.467] Cam reference position (Initial setting)
[Pr.468] Cam axis current value per cycle (Initial setting)
5 SYNCHRONOUS CONTROL INITIAL POSITION
146
5.3 Cam Axis Position Restoration Method
[Md.407] Cam axis current
value per cycle
[Md.408] Cam reference
position
The cam axis feed current value is restored
based on the cam axis current value per
cycle and the cam reference position.
[Md.409] Cam axis feed current value
Setting value
1000 [pulse]
200 [pulse]
2: Cam axis feed current value restoration
2: Feed current value
1: Initial setting value of cam axis current value per cycle
None
0 [pulse]