
B-63323EN-1/03 7.FEEDRATE CONTROL/ACCELERATION AND DECELERATION CONTROL
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7.1.14 Fine HPCC
General
This function is designed to achieve high-speed, high-precision
machining with a program involving a sequence of very small straight
lines and NURBS curved lines, like those used for metal die machining.
This function can suppress the servo system delay and delay caused by
acceleration/deceleration that increase as a higher feedrate is used.
This function can be used to ensure that the tool strictly traces the
specified values, thus minimizing machining profile errors and
achieving high-speed, high-precision machining.
HPCC stands for high precision contour control. In fine HPCC mode,
acceleration/deceleration is performed more precisely than in the
conventional HPCC mode, resulting in an increase in the cutting speed.
Format
Thus, this function can be used to ensure that the tool strictly traces the
specified values, thus minimizing machining profile errors for higher-
speed, higher-precision machining.
G05.1 Q1 : Look-ahead acceleration/deceleration
before interpolation mode on
(Multi-buffer mode is set at the same time.)
G05.1 Q0 : Look-ahead acceleration/deceleration
before interpolation mode off
(Multi-buffer mode remains set.)
G05.1 P1 Q0: Look-ahead acceleration/deceleration
before interpolation mode off
(Multi-buffer mode is cleared.)
Specify G05.1 alone in a block.
Fine HPCC mode can be automatically turned on at
power-up and upon a reset if the MBF bit (bit 6 of
parameter 2401) is specified accordingly.
Fine HPCC mode can be turned on and off by
G05P10000 and G05P0, which specify the
application of high precision contour control by the
64-bit RISC processor of the FANUC Series 15-MB.
For details, see "Specifying G05P10000/G05P0,"
below.
- Functions enabled
In fine HPCC mode, the following functions are enabled:
(1) Linear acceleration/deceleration before interpolation or bell-
shaped acceleration/deceleration before interpolation
(2) Deceleration function based on feedrate differences at corners
(3) Advanced feed-forward function
(4) Nano interpolation