
B–63833EN–1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
353
Linear acceleration/
deceleration before
interpolation
Calculation
of feedrate
Specified
feedrate
Calculation of
interpolation
Acceleration/
deceleration af-
ter interpolation
Servo
control
Pulse
distribution
Linear interpolation,
circular interpolation, etc.
(Example of deceleration)
To execute a block at a specified feedrate, the feedrate is reduced from that
of the previous block.
F3
F2
F1
N1 N2
Point 1
Point 2
Specified feedrate
Feedrate resulting
from acceleration/
deceleration before
interpolation
Feedrate
Time
To reduce the feedrate from F3 to F2, deceleration must be started at Point
1.
To decrease the feedrate from F2 to F1, deceleration must be started at
Point 2.
Since advanced preview control for multiple blocks is performed,
deceleration over multiple blocks can be performed.
(Example of acceleration)
To execute a block at a specified feedrate, the feedrate is increased.
Specified feedrate
Feedrate resulting
from acceleration/
deceleration before
interpolation
Feedrate
Time
F3
F2
F1
N1 N2