
B-63942EN/02 NC FUNCTION 4.FEED FUNCTION
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4.29 RIGID TAPPING BELL-SHAPED
ACCELERATION/DECELERATION
In rigid tapping, bell-shaped acceleration/deceleration of constant
acceleration type can be applied by parameter setting.
In parameters, set a time required until a maximum spindle speed is
reached (linear portion) and a time required for the curved portion.
The actual time constant for the linear portion is the proportion of the
maximum spindle speed to a specified S value.
The time constant for the curved portion is determined not by an S
command but by a set value.
Accordingly, the actual time constant is [proportionally calculated
value for linear portion + value for curved portion].
min
-
msec
Bell-shaped acceleration/deceleration
(constant acceleration)
T
2
T
2
T
1
Set time constants T
1
and T
2
in parameters.
(From the maximum speed and setting of T
1
, the
acceleration of linear portion <1> is constant.)
<1>
NOTE
In three-dimensional rigid tapping, bell-shaped
acceleration/deceleration is disabled, and linear
acceleration/deceleration is applied.