
PROGRAMMING
B–64124EN/01
19. HIGH SPEED CUTTING
FUNCTIONS
399
Linear acceleration/deceleration not reaching specified acceleration/deceleration
Specified
speed
Speed
Time
T1T1
T2
Fig.19.4 (b)
If linear acceleration/deceleration not reaching the specified acceleration
occurs in AI contour control mode 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 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.
This function becomes effective for the Acceleration /deceleration before
look–ahead interpolation in AI contour control mode.
Non–linear acceleration/deceleration
Specified speed
Speed
T1’
T2’ T2’
Time
Fig.19.4 (c)