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

B-63324EN/03 PROGRAMMING 19.AXIS CONTROL FUNCTIONS
- 715 -
Explanation
- Selection of the coordinate system in parallel axes
An individual offset from the workpiece reference point can be
specified for each of the control axes represented by a single
programmed axis. The coordinate systems of the control axes can be
programmed independently.
When a machine has two heads and each head has two control axes X
and Y, for example, the tools are operated as shown below.
X
1
Y
1
X
2
Y
2
Reference
position of head 1
Y
X
(d)
(b)
(c)
(a)
(a)
(b)
(c)
(d)
Reference
position of head 2
Current position of
the tool of head 1
Current position of
the tool of head 2
Workpiece coordinate
system of head 1
Workpiece coordinate
system of head 2
Offset from the workpiece
reference point of head 1
Offset from the
workpiece reference
Zero point of the machine coordinate system
(e)
(e)
Intermediate point of the
head 1
(f)
Intermediate point of the
head 1
(f)
Fig.19.6 (b)
(a) Incremental move command
(Example)G91 X_ Y_ ;
(b) Absolute move command
(Example)G90 X0 Y0;
(c) Move command on the machine coordinate system
The tool is moved to the point determined by the axes of the
machine coordinate system.
(Example)G90 G53 X_ Y_ ;
(d) Automatic return to the reference position (G28, G30)
The tools are moved to the reference positions of the control axes,
which are individually specified in the parameters.
(Example)G91 G28 X0 Y0;
(e) Reference position return check(G27)
Checks whether the tool has returned to the reference position on
each axis.
(Example)G91 G27 X0 Y0;

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