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

18.HIGH-SPEED CUTTING FUNCTICNS PROGRAMMING B-63324EN/03
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18.4 LOOK-AHEAD ACCELERATION/DECELERATION BEFORE
INTERPOLATION (G05.1)
This function is designed to achieve high-speed, high-precision
machining with a program including a combination of straight lines and
arcs, like those used for parts machining. This function can suppress
both servo system delay and the delay caused by
acceleration/deceleration that increase together with the feedrate.
Thus, this function can be used to ensure that the tool strictly traces the
specified values, thus minimizing machining profile errors
To perform high-precision machining involving a sequence of very
short straight lines and NURBS curved lines, like that used for metal
die machining, the fine HPCC function is required. B
Format
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 only G05.1 in a single block.
Look-ahead acceleration/deceleration before
interpolation 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.
Explanation
- Functions enabled
In look-ahead acceleration/deceleration before interpolation 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
For details of these functions, refer to the Connection Manual
(FUNCTION) (B-63323EN-1).
Dedicated parameters are supported for each function.

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