
B–63840EN/03
4. DESCRIPTION OF PARAMETERS
65
<Rapid traverese linear acceleration/deceleration>
Speed
Rapid traverse feed rate
Time
T: Time constant for linear
acceleration/deceleration
T
T
<Rapid traverse bell shaped acceleration/deceleration>
Speed
Rapid
traverse rate
Time
T
2
/2
T
2
T
1
T
2
/2
T
1
: Set a time constant used for lin-
ear acceleration/deceleration
T
2
: Set a time for rounding.
Total time=T
1
+ T
2
Time for linear=T
1
– T
2
Time for rounding part=T
2
Set the value when the rapid traverse rate is 100%. If it is under 100%, the
total time is reduced. (Constant acceleration method)
The value of T
1
is determined from the torque of motor. Usually set the
value of T
2
to 24 ms ir 32 ms.
1621
Time constant t T
2
used for bell–shaped acceleration/deceleration in rapid tra-
verse for each axis
[Data type] Word axis
[Unit of data] ms
[Valid data range] 0 to 512
Specify time constant T
2
used for bell–shaped acceleration/deceleration
in rapid traverse for each axis.
NOTE
1 This parameter is effective when the function of bell–shaped
acceleration/deceleration in rapid traverse is provided. Set
parameter No.1620 to time constant T
1
used for
bell–shaped acceleration/deceleration in rapid traverse, and
set this parameter to time constant T
2
.
For details of time constants T
1
and T
2
, see the description
of parameter No.1620.
2 When this parameter is set to 0, linear acceleration/
deceleration is applied in rapid traverse. The setting in
parameter No.1620 is used as a time constant in linear
acceleration/deceleration.