
B-63944EN/02 PROGRAMMING 21.5-AXIS MACHINING FUNCTION
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- Feature coordinate system with the table rotated by G53.1 (tool axis direction
control)
The mixed-type machine shown in Fig. 21.2 (j) is explained as an
example.
If the table rotates by the tool axis direction control command (G53.1),
the feature coordinate system (called the first feature coordinate
system), which is set in the workpiece coordinate system by the
feature coordinate system set command (G68.2), rotates as much as
the table rotates.
The feature coordinate system that has rotated is called the second
feature coordinate system.
Once G53.1 is specified, the subsequent machining commands are
assumed to be specified in the second feature coordinate system.
(See Fig. 21.2 (k).)
In the mixed-type machine, the specified feature coordinate system
(the first feature coordinate system) may differ from the feature
coordinate system to be used for machining (the second feature
coordinate system).
X
Y
Z
Xc'
Yc'
Zc'
•
G53.1 command
X
Y
Z
Xc'
Yc'
Zc'
G01 Y10.0 F1000
command after G53.1
Second feature coordinate
system
Xc'-Yc'-Zc'
Second feature coordinate
system
Xc'-Yc'-Zc'
Fig. 21.2 (k) Resetting of the feature coordinate system