
B–63833EN–1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
387
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>
Feedrate
Time
Acceleration
0
0
Time
Acceleration
Time
Time
Feedrate
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.
7.2.2
Rapid Traverse
Bell–shaped
Acceleration/
Deceleration
General