FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

PROGRAMMING
B–62754EN/01
5. FEED FUNCTIONS
77
If the direction of movement changes between specified blocks during
cutting feed, a rounded–corner path may result (Fig. 5.1 (b)).
0
Programmed path
Actual tool path
X
Z
Fig. 5.1 (b) Example of Tool Path between Two Blocks
In circular interpolation, a radial error occurs (Fig. 5.1(c)).
0
r
r:Error
Programmed path
Actual tool path
X
Z
Fig. 5.1 (c) Example of Radial Error in Circular Interpolation
The rounded–corner path shown in Fig. 5.1(b) and the error shown in Fig.
5.1(c) depend on the feedrate. So, the feedrate needs to be controlled for
the tool to move as programmed.
D Tool path in a cutting
feed

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