
19.FUNCTIONS FOR HIGH-SPEED CUTTING NC FUNCTIONS B-63782EN/01
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If linear acceleration/deceleration not reaching the specified
acceleration occurs as shown above, this function shortens the
acceleration/deceleration time by changing the internal acceleration for
acceleration/deceleration before interpolation and the bell-shaped time
constant in order to generate an acceleration/deceleration pattern as
close as possible to that that permits optimum bell-shaped
acceleration/deceleration before interpolation for the specified speed.
Optimum bell-shaped acceleration/deceleration before interpolation,
as mentioned here, refers to bell-shaped acceleration/deceleration
before interpolation in which if T2 > T1, T1 and T2 are changed to T1'
and T2' as shown in the figure below so that linear
acceleration/deceleration not reaching the specified
acceleration/deceleration does not occur.
Non-linear acceleration/deceleration
Specified
speed
Speed
T1'
T2' T2'
Fig.19.4.1(c)