
PROGRAMMING22. RISC PROCESSOR
B–63534EN/02
622
When bit 3 (OVR) of parameter No. 8459 is 1, the following feedrates can
be overridden:
– Feedrate decelerated by deceleration based on feedrate difference in
look–ahead acceleration/deceleration before interpolation
– Feedrate decelerated by deceleration based on acceleration rate in AI
High Precision Countour Control.
– Feedrate decelerated by deceleration based on acceleration rate in
circular interpolation
– Feedrate decelerated by acceleration clamp in involute interpolation
– Minimum feedrate for deceleration based on acceleration rate in AI
High Precision Countour Control and circular interpolation
– Maximum feedrate of AI High Precision Countour Control.
Even when the feedrate is overridden, the resulting feedrate does not
exceed the maximum cutting feedrate (parameter No. 1422 or No.1430
or No.1432).
If the calculated feedrate exceeds either the upper limit (parameter No.
8465) for automatic feedrate control that is set for the appropriate
parameter or the feedrate specified with an F command, clamping is
performed with the smaller of the upper limit feedrate and the feedrate
specified with the F command.
If the feedrate calculated by the deceleration function based on the
acceleration is smaller than the lower feedrate limit for the deceleration
function based on the acceleration of AI High Precision Countour Control
set for parameter No. 19511, the lower feedrate limit is used for the
feedrate. If, however, the specified feedrate is smaller than the lower
feedrate limit, the specified feedrate is used.
In AI high precision contour control mode or in AI nano high precision
contour control mode, 3–dimensional coordinate conversion, coordinate
system rotation, scaling, and rotary table dynamic fixture offset can be
executed.
In the mode of each of the 3–dimensional coordinate conversion,
coordinate system rotation, scaling, and rotary table dynamic fixture
offset functions, AI high precision contour control mode or AI nano high
precision contour control mode can be turned on and off with the
appropriate parameter settings.
For the function which can be used and limitations in the AI High
Precision Contour Control mode or in the AI NANO High Precision
Contour Control mode, refer to the “Function List which can be used” and
“Restrictions”.
The following functions can be used but the state can not be changed in
the AI High Precision Contour Control mode or in the AI NANO High
Precision Contour Control mode.
S Inch/metric conversion (An alarm(P/S5000) is issued if the state is
changed by G20 or G21)
Another example of
determining the feedrate
Miscellaneous
22.1.3
Restrictions
D Restriction–1