
1.AXIS CONTROL B-63943EN-1/02
- 264 -
Note the following points when specifying parameters for the
electronic gear box.
1 Arrange the controlled axes such that a slave axis appears before
a dummy axis.
(Example)
Example of correct setting Example of incorrect setting
Axis name
Servo axis
number
(No.1023)
Axis name
Servo axis
number
(No.1023)
X 1 X 1
Y 2 Y 2
C (dummy axis) 3 C (slave axis) 3
C (slave axis) 4 C (dummy axis) 4
2 Do not use a name which is usually not allowed to be used as an
axis address, such as D.
3 Specify the same values for an EGB slave axis and an EGB
dummy axis in the following parameters.
1013#0 to 3 Increment system
1004#7 Ten times minimum input increment
1001#0 Inch/metric switching (rotation axis/linear axis)
1006#1 Shape of machine coordinate system (rotation
axis/linear axis)
1006#2 Shape of machine coordinate system for pitch
error compensation (rotation axis/linear axis)
1006#3 Diameter/radius specification
1420 Rapid traverse rate
1421 Rapid-traverse override F0 speed
1820 Command multiplication
2000 and over Parameters related to digital servo
4 Specify the amount of travel per rotation about a rotation axis for
a slave axis in a parameter No. 1260.
5 Make the specification for a dummy axis in the following way.
1815#1 Whether to use separate detectors. Although an EGB
dummy axis uses the interface of a separate detector,
set these parameters to 0.
6 To reduce the synchronization error, enable feed forward and set
the feed forward coefficient to as large a value as possible.
2003#3=1 The velocity control system is PI control.
2005#1 =1 Feed forward is enabled.
2068=10000 Feed forward coefficient
For details of how to set parameters: refer to the section "Feed
forward function" in "Shape error suppression function in the
"FANUC AC SERVO MOTOR
αis/αi/βis series Parameter
Manual (B-65270EN)".