
4. DESCRIPTION OF PARAMETERS
B–63010EN/02
84
1626
Time constant of exponetial acceleration/deceleration in the thread cutting cycle
for each axis
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 4000
Set the time constant used for exponential acceleration/deceleration in the
thread cutting cycle (G76, G78 (G92 in G code system A)) for each axis.
If the acceleration type is not exponential acceleration/deceleration,
parameter No. 1622 becomes valid.
1627
FL rate of exponential acceleration /deceleration in the thread cutting cycle for
each axis
[Data type] Word axis
[Unit of data]
[Valid data range]
Valid data range
ncremen
sys
em
n
o
a
a
IS-A, IS-B IS-C
Millimeter machine 1 mm/min 6 to 15000 6 to 12000
Inch machine 0.1 inch/min 6 to 6000 6 to 4800
Rotaion axis 1 deg/min 6 to 15000 6 to 12000
Set the lower limit (FL rate) of exponential acceleration/deceleration in the
thread cutting cycle (G76, G78 (G92 in G code system A)) for each axis.
1630
Parameter 1 for setting an acceleration for linear acceleration/deceleration be-
fore interpolation (maximum machining feedrate during linear acceleration/de-
celeration before interpolation)
[Data type] 2–word
Valid data range
ncremen
sys
em
n
o
a
a
IS-A, IS-B IS-C
Millimeter machine 1 mm/min 6 to 240000 6 to 100000
Inch machine 0.1 inch/min 6 to 96000 6 to 48000
This parameter is used to set an acceleration for linear acceleration/
deceleration before interpolation. In this parameter, set a maximum
machining speed during linear acceleration/deceleration before
interpolation. In parameter No.1631, set a time used to reach the maximum
machining speed.
Speed
Parameter 1
Parameter 2
Time
Parameter 1: Parameter No.1630
Parameter 2: Parameter No.1631