
B–63380EN/02
4. DESCRIPTION OF PARAMETERS
47
1620
Time constant used for linear acceleration/deceleration or bell–shaped accelera-
tion/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 linear acceleration/deceleration in rapid
traverse.
<Rapid traverese linear acceleration/deceleration>
Speed
Rapid traverse feed rate
Time
T: Time constant for linear
acceleration/deceleration
T
T
1622
Time constant of exponential acceleration/deceleration or bell–shaped accelera-
tion/deceleration after interpolation, or linear aceeleration/deceleration after
interpolation in cutting feed for each axis
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 4000(exponential acceleration/deceleration in cutting feed)
0 to 512 (linear or bell–shaped acceleration/deceleration after
interpolation in cutting feed)
Set the time constant used for exponential acceleration/deceleration in
cutting feed, bell–shaped acceleration/deceleration after interpolation or
linear 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.
Speed
T
Time
T : Total time. it is constant irrespective of feed rate.
(Time constant is constant).
The curve corresponds to that T1 = T/2 and T2 = T/2 set in pa-
rameter No.1620 and 1621.
Bell–shaped acceleraton/deceleration after cutting feed interpolation