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Cam Axis Feed Current Value Restoration - Mitsubishi Electric RD77MS2 User Manual

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Cam axis feed current value restoration

If "[Pr.462] Cam axis position restoration object" is set to "2: cam 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 120 Cam Position Calculation Function) or with synchronous control analysis
mode (Page 118 Synchronous Control Analysis Mode) before starting synchronous control. Then start
synchronous control after positioning to the correct cam axis feed current value.
[Md.407] Cam axis current
value per cycle
[Md.408] Cam reference
position
5 SYNCHRONOUS CONTROL INITIAL 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
5.3 Cam Axis Position Restoration Method
5
117

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