
B–65160E/02
1. ADJUSTMENT
FANUC AC SPINDLE MOTOR a series
23
16i/16 #7 #6 #5 #4 #3 #2 #1 #0015i15
VDT3 VDT2 VDT1
6511 3011 3011 4011
6651 3151
1st–
2nd–
VDT3-VDT1:
Setting of speed detector
VDT3 VDT2 VDT1 Setting of speed detector
0 0 0 64l/rev
0 0 1 128l/rev
0 1 0 256l/rev
0 1 1 512l/rev
1 0 0 192l/rev
1 0 1 384l/rev
When using a spindle motor with a built–in high–resolution magnetic
pulse coder, set 128
l/rev. When a detector for Cs contouring control is
used with a built–in motor, the setting depends on the diameter of the
detector drum.
Motor model and Number of cogs of MZ sensor gear
Motor model Number of cogs of MZ sensor gear
α0.5 64 λ/rev
α1 to α3
(α6/12000)
128 λ/rev
α6 to α40
αP8 to αP60
256 λ/rev
(3) Procedure for setting detector–related parameters
The setting of the parameters used for typical detector configurations
is described below.
With the aseries spindle, the detector circuitry hardware is set by
parameter setting. This means that alarms such as disconnection or
overheat alarms may be output while detector–related parameters are
being set.
To initialize the hardware, briefly turn off the amplifier power after
setting the detector–related parameters.
(a) When a M sensor in a motor is used together with a position coder
Example system configuration:
Spindle
amplifier
JY4 JY2
M sensor
Spindle
Motor
Position coder
1. Connect the feedback signal cables.
(9D00.D)
(9D00.D)