
5.FUNCTION DESCRIPTIONS FANUC AC SPINDLE MOTOR αi series B-65280EN/05
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(b) Tuning the percentage limit to an acceleration during deceleration
Specify the acceleration limitation start speed during deceleration ω
LS
(parameter Nos. 4326 and 4330) as follows:
Acceleration limitation start speed during deceleration ω
LS
= 1.1 ×
base speed ω
B
Then, decrease the percentage limit to an acceleration during
deceleration (parameter No. 4064) until the torque command will not
be saturated at the end of sequence interval C or in sequence interval
D. In this case, there is no problem even if the torque command is
about to be saturated at the beginning of sequence interval C. (See the
following figure.)
Example 1 of the percentage limit to an
acceleration during deceleration (bad case)
B
C
D
E
Spindle orientation
sequence (data No. 298)
Torque command
(data No. 90)
NG.
25%
Example 2 of the percentage limit to an
acceleration during deceleration (good case)
OK.
OK.