
B–63523EN–1/03
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
938
T1
T2
Speed
Linear acceleration/deceleration not reaching
specified acceleration/deceleration
Time
Specified
speed
T1
Fig. 7.1.21(b)
If linear acceleration/deceleration not reaching the specified acceleration
occurs in AI contour control (AICC) mode or AI Nano contour control
(AI nanoCC) mode or AI High Precision Contour control (AI–HPCC)
mode or AI Nano High Precision Contour control (AI–nanoHPCC) 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 or AI Nano contour
control mode or AI High Precision Contour control mode or AI Nano
Contour control mode..
T2′
Speed
Time
Specified
speed
T1′
Non–linear acceleration/deceleration
T2′
Fig. 7.1.21(c)