Specifications

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CONCISE GUIDE FANUC 47
4.0 FIXED FANUC CYCLES
Fixed cycles are functions that simplify the ISO programming.
The most commonly used fixed cycles are described below.
4.1 “G71” MATERIAL REMOVAL BY TURNING
The “G71” function activates the material removal by turning cycle.
With this function the tool makes increments on axis X and turning on axis Z.
The material removal cycle in turning is always composed of two program blocks.
Example:
N17 …….
N18 G0 X.. Z.. .
N19 G71 U… R…
N20 G71 P… Q… U… W… F…
N21 G0/G1 X… Z…
N22 …
N23 … description of finished profile
N24 …
Where:
• X => Start cycle co-ordinate along axis X
• Z => Start cycle co-ordinate along axis Z
1
st
BLOCK OF G71
• U => Depth of radial cut without sign.
• R => Tool separation in return path at 45° value without sign
2
nd
BLOCK OF G71
• P => Number of block where the rough machining profile starts
• Q => Number of block where rough machining profile finishes