
PROGRAMMING
B–64124EN/01
19. HIGH SPEED CUTTING
FUNCTIONS
381
The functions listed below are valid in the AI advanced preview
control/AI contour control mode:
⋅ Look–ahead linear acceleration/deceleration before interpolation
⋅ Look–ahead bell–shaped acceleration/deceleration before interpolation
(The option of look–ahead bell–shaped acceleration/deceleration
before interpolation is required.)
⋅ Automatic corner deceleration
⋅ Feedrate clamping by acceleration
⋅ Feedrate clamping by arc radius
⋅ Block overlap
⋅ Advanced preview feed forward
For a cutting feed command in the feed per minute mode, linear
acceleration/deceleration can be applied before interpolation, that is, for
the specified feedrate by reading up to 20 blocks (in the AI advanced
preview control mode) or 40 blocks (in the AI contour control mode) in
advance. With acceleration/deceleration after interpolation, the
interpolated data is changed because acceleration/deceleration is applied
to the data. With acceleration/deceleration before interpolation, the
interpolated data cannot be changed by acceleration/deceleration because
acceleration/ deceleration is applied to the feedrate data before
interpolation. For this reason, the interpolated data can always be applied
to the specified straight line or curve to eliminate machining profile errors
caused by acceleration/deceleration delays.
Linear interpolation,
circular interpolation, etc.
Distribution
pulse
Specified
feedrate
Linear accelera-
tion/deceleration
before
interpolation
Feedrate
calculation
Servo
control
Acceleration/
deceleration
after
interpolation
Interpolation
calculation
D Functions valid in the AI
advanced preview
control/AI contour
control mode
D Look–ahead linear
acceleration/deceleration
before interpolation