B–64113EN–1/01
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
425
Linear acceleration/deceleration before interpolation for cutting feed in
the AI contour control mode can be changed to bell–shaped
acceleration/deceleration before interpolation. With bell–shaped
acceleration/deceleration before interpolation, smooth acceleration/
deceleration can be applied to the cutting feedrate to reduce the shock on
the machine by fluctuations in acceleration that are involved in changes
in the cutting feedrate.
To use this function, the option of look–ahead bell–shaped acceleration/
deceleration before interpolation is required.
Time
Acceleration
tbtb
tbtb
ta ta
tc tc
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
tc = ta + tb
ta is not constant and depends
on the specified feedrate.
ta =
Specified feedrate
Linear acceleration
tb is constant.
tc = ta + tb
12.
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
D Look–ahead bell–shaped
acceleration/deceleration
before interpolation