B–65160E/02
2. FUNCTION EXPLANATION
FANUC AC SPINDLE MOTOR a series
121
Set parameter Nos. 6780 to 6783 to the same value as parameter
Nos. 6569 to 6772.
Gear selection signal
Common to all
Cs contouring
CTH1 CTH2
servo axes
control axis
(spindle)
0 0 6780 6569
0 1 6781 6570
1 0 6782 6571
1 1 6783 6572
(b) If the position gains of the servo axes and Cs contouring control
axis need not be equal, a position gain is specified for each axis
in the parameters listed in the following table.
Parameter Nos. 6780 to 6783 which are common to all servo axes
must be set to 0.
Gear
selection
signal
For each
axis
T series:
X axis
For each
axis
T series :
Z axis
For each
axis
T series :
Cs axis
For each
axis
T series :
4th axis
Cs
contouring
control
CTH1 CTH2
X axis
M series :
X axis
Z axis
M series :
Y axis
Cs axis
M series :
Z axis
4th axis
M series :
Cs axis
axis
(spindle)
0 0 6784 6788 6792 6796 6569
0 1 6785 6789 6793 6797 6570
1 0 6786 6790 6794 6798 6571
1 1 6787 6791 6795 6799 6572
(c) The position gains of the servo control axes in the spindle rotation
control mode must be set in parameter Nos. 517, and 512 to 515.
(4) Return to the reference position in the Cs contouring control mode
When the machine returns to the reference position in the normal
operation mode, the rapid feed is decelerated to the FL speed by the
deceleration dog. In the Cs contouring control mode, however, when
the reference position return command is input, the one-rotation
signal is detected, then the machine returns to the reference position.
So no deceleration dog is necessary in the Cs contouring control
mode.
(a) Manual return to the reference position (jog mode)
The speed of the reference position return is determined by the
parameter for the maximum spindle speed in the Cs contouring
control mode (No. 6521).
The direction of reference position return is set in parameter
PRM 6500#3.