
B-65280EN/05 FANUC BUILT-IN SPINDLE MOTOR Bis series 5.FUNCTION DESCRIPTIONS
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(7) Tuning the acceleration limitation start speed during deceleration
(parameter Nos. 4326 and 4330)
If you tuned the percentage limit to an acceleration during
deceleration as explained in item (6), tune also the acceleration
limitation start speed during deceleration.
(a) Deciding whether or not to tune the acceleration limitation start speed during
deceleration
Start spindle orientation when the spindle is running at 10 min
-1
+ acceleration limitation start speed during deceleration ω
LS
,
which is an initial setting used when the percentage limit to an
acceleration during deceleration is tuned. (See the following
figure.) In this case, it is necessary to tune the percentage limit to
an acceleration during deceleration if the torque command is
saturated in sequence interval C or D.
If the torque command is not saturated, stop tuning the spindle
orientation.
Case in which parameter tuning is necessary
B
C
D
E
Spindle orientation
sequence (data No. 298)
Torque command
(data No. 90)
O.K.
25%
Case in which parameter tuning is
unnecessary
N.G.
(b) Tuning the acceleration limitation start speed during deceleration
Increase the acceleration limitation start speed during
deceleration (parameter Nos. 4326 and 4330) until the torque
command will not be saturated at the end of sequence
interval C or in sequence interval D even when spindle
orientation is started when the spindle is running at 10 min
-1
+ acceleration limitation start speed during deceleration ω
LS
.
Similarly to item (6), there is no problem even if the torque
command is about to be saturated at the beginning of
sequence interval C.