
4.DESCRIPTION OF PARAMETERS B-63530EN/03
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1620
Time constant T or T
1
used for linear acceleration/deceleration or
bell-shaped acceleration/deceleration in rapid traverse for each axis
[Data type] Word axis
[Unit of data] msec
[Valid data range] 0 to 4000
Specify a time constant used for acceleration/deceleration in rapid
traverse. (When the optional function of bell-shaped acceleration/
deceleration in rapid traverse is provided, bell-shaped acceleration/
deceleration is applied in rapid traverse. If the function is not provided,
linear acceleration/deceleration is applied.)
(1) When the function is provided, set this parameter to time
constant T
1
used in bell-shaped acceleration/deceleration in rapid
traverse, and set parameter No.1621 to time constant T
2
.
(2) When the function is not provided, specify a time constant used
in linear acceleration/deceleration.
NOTE
1 When parameter No.1621 (time constant T
2
used
for bell-shaped acceleration/deceleration in rapid
traverse) is set to 0, linear acceleration/
deceleration is applied in rapid traverse even if the
function is provided. In this case, this parameter
stands for a time constant used in linear
acceleration/deceleration in rapid traverse.
2 Depending on the set time constant value, a
movement may be made for a certain period of
time at a feedrate slightly lower than the rapid
traverse rate before the rapid traverse rate is
reached by acceleration. To avoid this
phenomenon, set a multiple of 8 as the time
constant.
<Rapid traverse linear acceleration/deceleration>
Speed
Rapid traverse
feed rate
Time
T: Time constant for linear acceleration/deceleration
T
T