
B–63173EN–1/01
7. FEEDRATE CONTROL/ACCELERATION
AND DECELERATION CONTROL
265
1620
Time constant used for linear acceleration/deceleration or bell–shaped
acceleration/deceleration in rapid traverse for each axis
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 4000
Specify a time constant used for acceleration/deceleration in rapid tra-
verse.
(1) When the function is provided, set this parameter to time constant T1
used in bell–shaped acceleration/deceleration in rapid traverse, and
set parameter No.1621 to time constant T2.
(2) When the function is provided, specify a time constant used in linear
acceleration/deceleration and set parameter No.1621 to 0.
1622
Time constant of exponential acceleration/deceleration or linear acceleration/
deceleration after interpolation or bell–shaped acceleration/deceleration
after interpolation, in cutting feed for each axis
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 4000 (For exponential acceleration / deceleration)
0 to 8192 (For linear acceleration / deceleration after interpolation or
bell–shaped acceleration/deceleration after interpolation)
Set the time constant used for exponential acceleration/deceleration or
linear acceleration/deceleration after interpolation or bell–shaped
acceleration/deceleration after interpolation in cutting feed for each axis.
Except for special applications, the same time constant must be set for all
axes in this parameter. If the time constants set for the axes differ from
each other, proper straight lines and arcs cannot be obtained.
1623 FL rate of exponential acceleration/deceleration in cutting feed for each axis
[Data type] Word axis
Valid data range
y
IS-A, IS-B IS-C
Millimeter machine 1 mm/min 6 – 15000 6 – 12000
Inch machine 0.1 inch/min 6 – 6000 6 – 4800
Rotaion axis 1 deg/min 6 – 15000 6 – 12000
Set the lower limit (FL rate) of exponential acceleration/deceleration in
cutting feed for each axis. Except for special applications, this parameter
must be set to 0 for all axes. If a value other than 0 is specified, proper
straight lines and arcs cannot be obtained.
[Unit of data]
[Valid data range]