
B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
125
(1) Axis arrangement in the Cs contouring control mode
(a) The same number as the control axis number must be set for the
servo axis number of the axis for which Cs contouring control is
performed. If a different number is set, a servo alarm (SV026)
is generated for all axes.
Sample arrangement X, Y, Z : Servo axes
C : Cs contouring control axis
Control axis
No.
Axis name Servo axis
No.
1 X 1
2 Y 2
3 Z 3
4 C 4
(b) Removal of the control axis in the Cs contouring control mode
If removal of the control axis is specified for the Cs contouring
control axis, the spindle enters the spindle rotation control mode.
Therefore do not specify removal of the control axis.
(c) Axis arrangement for 15TT
In 15TT, two-spindle control is enabled. If both spindles are used
as the Cs contouring control axes, place one Cs contouring
control axis on a tool post, and the other axis on another tool post.
The two Cs contouring control axes cannot be placed on one tool
post.
(2) Gear selection signals and position gain in the Cs contouring
control mode
Gear stages 1 to 4 can be used. Stages 5 to 8 cannot be used.
In addition to gear selections signals GS1, GS2, and GS4, clutch/gear
signals CTH1A and CTH2A must be applied simultaneously.
The relationships the selected position gain has with the gear
selection and clutch/gear signals are listed below.
Position gain parameter for each axis
GS4 GS2 GS1 CTH1A CTH2A
Position gain parameter for each axis
in the Cs contouring control mode (*1)
0 0 0 0 0 3069
0 0 1 0 1 3070
0 1 0 1 0 3071
0 1 1 1 1 3072
1 0 0
1 0 1
1 1 0
Not used
1 1 1
(*1) When the same position gain as the Cs contouring control axis is set for
servo axes other than the Cs contouring control axis in the Cs contouring
control mode, set the parameter as follows:
2.5.8
Additional Description
of Series 15
Set the servo axis
number to the same
number as the control
axis number.