
B-63943EN-1/02 11.SPINDLE SPEED FUNCTION
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11.12.3 Commands for Feed per Minute and Feed per Revolution
The same descriptions as for normal rigid tapping are applicable. See
Subsection 11.11.4, "Commands for Feed per Minute and Feed per
Revolution".
11.12.4 Acceleration/Deceleration after Interpolation
Unlike conventional rigid tapping, interpolation type rigid tapping
enables the application of bell-shaped acceleration/deceleration or
linear acceleration/deceleration of constant acceleration/deceleration
time type.
- Linear acceleration/deceleration
When bit 0 (CTLx) of parameter No. 1610 is set to 1 and bit 1 (CTBx)
of parameter No. 1610 is set to 0, linear acceleration/deceleration of
constant acceleration/deceleration type can be applied.
Set a time constant in parameter No. 1622.
NOTE
1 Ensure that the same acceleration/deceleration type
and the same time constant are set for the drilling
axis and spindle. Otherwise, a malfunction can
occur.
2 The setting of a time constant differs from normal
rigid tapping.
Example)
Suppose that the parameters are set as follows: time constant TC
= 800 msec and maximum spindle speed S = 4000 min
-1
.
min
-1
4000
msec
800
800
In interpolation type rigid tapping, acceleration/deceleration before
look-ahead interpolation can be used.
Set a maximum allowable acceleration rate for acceleration/
deceleration before interpolation in parameter No. 1660.