
B-63943EN-1/02 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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7.2.2 Rapid Traverse Bell-shaped Acceleration/Deceleration
Overview
Rapid traverse bell-shaped acceleration/deceleration smoothly
increases or decreases the rapid traverse rate, reducing the stress and
strain imposed on the machine due to the variation in the acceleration
with changes in the feedrate. As the time constant for bell-shaped
acceleration/deceleration can be smaller than that for linear
acceleration/deceleration, the time needed for acceleration/
deceleration can be reduced.
<Rapid traverse linear acceleration/deceleration>
<Rapid traverse bell-shaped acceleration/deceleration>
Speed
Time
cceleration
0
0
Time
cceleration
0
Time
Time
Speed
0
This function is enabled when the time constants for rapid traverse
bell-shaped acceleration/deceleration T
1
and T
2
are specified in
parameter Nos. 1620 and 1621, respectively.