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

PROGRAMMING
7. FLOATING REFERENCE POSITION
RETURN (G30.1)
B–62754EN/01
86
7
FLOATING REFERENCE POSITION RETURN (G30.1)
Tools ca be returned to the floating reference position.
A floating reference point is a position on a machine tool, and serves as
a reference point for machine tool operation.
A floating reference point need not always be fixed, but can be moved as
required.
_:
G30.1 ;
Command of the intermediate position of the floating reference
position
(Absolute command/incremental command)


On some machine tools, the cutting tools can be replaced at any position
unless they interfere with the workpiece or tail stock.
With these machines, the cutting tools should be replaced at a position as
close to the workpiece as possible so as to minimize the machine cycle
time. For this purpose, the tool change position is to be changed,
depending on the figure of the workpiece. This operation can easily be
performed using this function. That is, a tool change position suitable for
the workpiece is memorized as a floating reference point. Then command
G30. 1 can easily cause return to the tool change position.
The G30.1 block first positions the tool at the intermediate point along the
specified axes at rapid traverse rate, then further moves the tool from the
intermediate point to the floating reference point at rapid traverse rate.
Before using G30.1, cancel cutter compensation and tool offset.
A floating reference point becomes a machine coordinate position
memorized by pressing the soft key
[SET FRP] on the current positions
display screen (see III–11.1.7).
A floating reference point is not lost even if power is turned off.
X
Z
G30.1 X40.0 Z50.0 ;
Workpiece
Intermediate position
Floating
reference
position
General
Format
Explanations
D Floating reference
position
D Setting of floating
reference position
Examples

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