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

PROGRAMMING
B–62754EN/01
4. INTERPOLATION FUNCTIONS
69
An arc must be specified such that it falls within a range in which the
major axis of the arc is always the Z–axis or always the X–axis, as shown
in Fig. 4.12 (a) and (b). If the arc includes a point at which the major axis
changes from the X–axis to Z–axis, or vice versa, as shown in Fig. 4.12
(c), P/S alarm 5058 is issued.
X
45°
Z
Start point
End point
Fig. 4.12 (a) Range in which the Z–axis is the major axis
X
45°
Z
Start point
End point
Fig. 4.12 (b) Range in which the X–axis is the major axis
X
45°
Z
The major axis changes at this point.
Start point
End point
Fig. 4.12 (c) Example of arc specification which causes an alarm
Limitations
D Range of specifiable arc

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