
B–63833EN–1/02
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
344
#7
1602
#6
LS2
#5 #4
CSD
#3 #2 #1 #0
FWB
[Data type] Bit
FWB Cutting feed acceleration/deceleration before interpolation
0 : Type A of acceleration/deceleration before interpolation is used.
1 : Type B of acceleration/deceleration before interpolation is used.
Type A: When a feedrate is to be changed by a command, acceleration/
deceleration starts after the program enters the block in which
the command is specified.
Type B: When a feedrate is to be changed by a command, deceleration
starts and terminates at the block before the blcock in which the
command is specified.
When a feedrate is to be changed by a command, acceleration
starts after the program enters theblock in which the command is
specified.
Feedrate Feedrate
Time
Type B
Type A
Time
F3
F2
F1
N1 N2
F3
F2
F1
N1 N2
Specified feedrate
Feedrate after accelera-
tion/deceleration before
interpolation is applied
Specified feedrate
Feedrate after accelera-
tion/deceleration before
interpolation is applied
<Example of a deceleration process> <Example of an acceleration process>
NOTE
Be sure to set this bit to 1.
CSD In the function for automatically reducing a feedrate at corners,
0 : Angles are used for controlling the feedrate.
1 : Differences in feedrates are used for controlling the feedrate.
LS2 Acceleration/deceleration after interpolation for cutting feed in the
advanced preview control mode
0 : Exponential acceleration/deceleration
1 : Linear acceleration/deceleration.