
B–63503EN–1/01
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
281
1771
Parameter 2 for setting an acceleration for linear acceleration/deceleration before
interpolation in the advanced preview control mode (time used to reach the maxi-
mum machining speed during linear acceleration/deceleration before interpolation)
[Data type] Word
[Unit of data] 1 ms
[Valid data range] 0 to 4000
This parameter is used to set an acceleration for linear acceleration/decel-
eration before interpolation in the advanced preview control mode. In this
parameter, set the time (time constant) used to reach the speed set in pa-
rameter No. 1770.
CAUTION
1 When 0 is set in parameter No. 1770 or parameter No. 1771,
linear acceleration/deceleration before interpolation is
disabled.
2 In parameter Nos. 1770 and 1771, set values that satisfy the
following: Parameter No. 1770/Parameter No. 1771
w5
1777
Minimum speed for the automatic corner deceleration function
(for the advanced preview control)
[Data type] Word axis
Valid data range
y
IS-B IS-C
Millimeter machine 1 mm/min 6 – 15000 6 – 12000
Inch machine 0.1 inch/min 6 – 6000 6 – 4800
Rotation axis 1 deg/min 6 – 15000 6 – 12000
Set a speed at which the number of buffered pulses in deceleration is as-
sumed to be 0 when linear acceleration/deceleration before interpolation
is used.
1779
Critical angle subtended by two blocks for automatic corner deceleration
(for the advanced preview control)
[Data type] Two–word
[Unit of data] 0.001 deg
[Valid data range] 0 to 180000
Set a critical angle to be subtended by two blocks for corner deceleration
when the angle–based automatic corner deceleration function is used.
The angle subtended by two blocks is defined as q in the examples shown
below.
[Unit of data]
[Valid data range]