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

18.HIGH-SPEED CUTTING FUNCTICNS PROGRAMMING B-63324EN/03
- 690 -
With the fine HPCC function, the additional functions listed below can
be used to achieve high-speed, high-precision machining for very small
straight lines and NURBS curved lines:
1) Feedrate determination based on acceleration on each axis
2) Deceleration function based on Z-axis fall angle
3) Fifteen-block multi-buffer function
(The number of blocks can be optionally increased to a maximum
of 100 blocks.)
For details of these functions, refer to the Connection Manual
(FUNCTION) (B-63323EN-1). Dedicated parameters are supported
for each function.
- Specifying G05P10000/G05P0
Fine HPCC mode can be turned on and off by G05P10000 and G05P0,
which are used to specify the application of high-precision contour
control by the 64-bit RISC processor of the FANUC Series 15-MB.
Fine HPCC mode differs from the high-precision contour control
applied by the 64-bit RISC processor of the FANUC Series 15-MB in
the following points:
1. Restrictions on specifiable G codes and the like differ from those of
high-precision contour control by RISC. See the restrictions
imposed on fine HPCC and look-ahead acceleration/deceleration
before interpolation for the FANUC Series 15i.
2. If the MSU bit (bit 1 of parameter 8403) of the FANUC Series
150MB is set to 1 while cutter compensation is used, the cutter
compensation vectors formed at the end of a block of a positioning
or auxiliary function and the preceding block are the same as the
cutter compensation vector formed at the end of the block
preceding the two blocks.
The FANUC Series 15i performs the calculation in the same way
as in normal cutter compensation. Accordingly, the tool path in
high-precision contour control by the RISC processor of the
Series 15-MB may differ from the tool path in fine HPCC mode of
the Series 15i.
3. In high-precision contour control by the RISC processor of the
Series 15-MB, if the SG0 bit (bit 7 of parameter 8403) is set to 1,
positioning in HPCC mode is always carried out by linear
interpolation. With the Series 15i, however, the type of
positioning in fine HPCC mode is determined by the LRP bit (bit
4 of parameter 1400), as in normal positioning.

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