
B-65280EN/05 FANUC AC SPINDLE MOTOR αi series 5.FUNCTION DESCRIPTIONS
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5.4.8 Spindle Data Used in Tuning
This subsection describes high-speed spindle orientation-related data
that can be observed using the spindle check board
(A06B-6078-H001). Refer to an applicable maintenance manual for
detailed explanations about how to use the spindle check board.
(1) Motor speed (data No. 19) and motor speed command (data No. 16)
These are spindle motor speed data and speed command data. The
following table lists the relationships between the shift amount and the
check board output value (if shift direction 0 and offset 1 are
specified).
Shift amount 15 16 17 18 19 20
Output value (min
-1
/5V) 1024 2048 4096 8192 16384 32768
(2) Torque command (data No. 90)
This is motor torque command data. If shift amount 8, shift direction 0,
and offset 1 are specified, the check board output value is 100%/2.5
V.
(3) Spindle orientation sequence (data No. 298)
This data represents a high-speed spindle orientation sequence. If shift
amount 4, shift direction 1, and offset 1 are specified, the check board
output and the state of each sequence interval are as follows:
0V
0.625V
4.375V
1.875V
BCDAE
: Before spindle orientation begins
B : Interval from the instant when an
spindle orientation command is input
and the instant which the orientation
speed is reached and a one-rotation
signal is detected
C : Interval during which the spindle is
linearly decelerating with a constant
specified for deceleration
D : State in which the position loop is
closed
E : Spindle orientation is completed (in-
position)
(4) Position error (data No. 136)
This is position error data (4096 pulses/rev) for spindle orientation.
The following table lists the relationships between the shift amount
and check board output value (when shift direction 0 and offset 1 are
specified).
Shift amount 0 1 2 3 4 5
Output value (pulses/5 V) 128 256 512 1024 2048 4096
The position error data is output only in sequence intervals C, D, and
E. It is 0 in the other intervals.