Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 18.HIGH-SPEED CUTTING FUNCTICNS
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- Fine high precision contour control (fine HPCC)
When the fine HPCC option is selected, fine HPCC mode is also set
when look-ahead acceleration/deceleration before interpolation mode
is set.
- Dry run
If the dry run signal switches from 0 to 1 or 1 to 0 during movement
along an axis, the feedrate is increased or decreased to a specified
feedrate. It is not decreased to 0. The deceleration function based on
feedrate differences at corners is enabled even in dry run mode.
- Gradual stop
If a block specifying no movement or a one-shot G code such as G04 is
specified in look-ahead acceleration/deceleration before interpolation
mode, a gradual stop occurs in the previous block.
Override to a determined feedrate
The following gives the specifications of override to a feedrate
determined by functions such as deceleration based on feedrate
difference in look-ahead acceleration/deceleration before interpolation
and deceleration based on acceleration rate in fine HPCC.
- When bit 6 (OVR) of parameter No. 1403 = 0
The conventional specifications apply.
Override is invalid for deceleration functions such as deceleration
based on feedrate difference and deceleration based on
acceleration rate.
- When bit 6 (OVR) of parameter No. 1403 = 1
Override is valid for deceleration functions such as deceleration
based on feedrate difference and deceleration based on
acceleration rate.
When bit 6 (OVR) of parameter No. 1403 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
fine HPCC.
- 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
fine HPCC and circular interpolation
- Maximum feedrate of fine HPCC
Even when the feedrate is overridden, the resulting feedrate does not
exceed the maximum cutting feedrate (parameter No. 1422).

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