
B–63523EN–1/03
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
961
Deceleration is performed when the following condition is
satisfied:
Distance to stored stroke limit 1
for each axis
Distance needed to reduce the cur-
rent feedrate (tangential feedrate)
to that specified in parameter No.
1784
<
The overrun is calculated as follows:
Overrun x
[FIX (
F
OT
F
T
8
) ) 1.5]
2
F
T
1875
F : Maximum cutting feedrate in linear acceleration/deceleration before
interpolation (parameter No. 1630)
T : Time needed to attain the maximum cutting feedrate in linear
acceleration/deceleration before interpolation (parameter No. 1631)
F
OT
: Feedrate at the time an overtravel alarm occurs during linear accel-
eration/deceleration before interpolation (parameter No. 1784)
FIX: Any fractional part is truncated.
#7
1602
#6 #5 #4 #3 #2 #1 #0
FWB
[Data type] Bit
FWB Linear acceleration/deceleration of cutting feed before interpolation
0 : Type A of acceleration/deceleration before interpolation is used.
1 : Type B of acceleration/deceleration before interpolation is used.
1630
Parameter 1 for setting an acceleration for linear acceleration/deceleration
before interpolation (maximum machining feedrate during linear
acceleration/deceleration before interpolation)
[Data type] Two–word
Valid data range
y
IS-A, IS-B IS-C
Millimeter machine 1 mm/min 6 – 240000 6 – 100000
Inch machine 0.1 inch/min 6 – 96000 6 – 48000
This parameter is used to set an acceleration for linear acceleration/decel-
eration before interpolation. In this parameter, set a maximum machining
feedrate during linear acceleration/deceleration before interpolation. In
parameter No. 1631, set a time used to reach the maximum machining fee-
drate.
Parameter
[Unit of data]
[Valid data range]