
PROGRAMMING
B–64124EN/01
19. HIGH SPEED CUTTING
FUNCTIONS
389
tc = ta + tb
The value of ta is not constant and
depends on the rapid traverse rate
and the time constant of the rapid
traverse rate for the specified axis.
The value of tb depends on the axis.
tbtbtbtb
tata
tctc
Feedrate
Time
Linear acceleration/
deceleration
Bell–shaped acceleration/
deceleration
ta Depends on the linear acceleration.
tb Time constant for bell–shaped
acceleration/deceleration
tc Bell–shaped acceleration/
deceleration time
If the feedrate during movement is F, the acceleration for linear
acceleration/deceleration is A, the time constant for bell–shaped
acceleration/deceleration is T, the time required for acceleration/
deceleration can be obtained as follows:
Time required for acceleration/deceleration
= F/A (linear acceleration/deceleration)
= F/A+T (bell–shaped acceleration/deceleration)
Feedrate
F
Time
T/2T/2
F/A
TT
F/A : Time required for linear acceleration
T : Time required for rounding the corner