
5.PROGRAM INPUT NC FUNCTION B-63942EN/02
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5.44 TILTED WORKING PLANE COMMAND
When a figure such as a hole or pocket is cut on a plane tilted relative
to the reference surface of the workpiece, this function defines a
coordinate system (referred to a "feature coordinate system") tied to
the plane. By specifying a position in such a coordinate system, a
program can be created more easily.
A feature coordinate system is defined on a workpiece coordinate
system.
See the figure below for the relationship between a feature coordinate
system and workpiece coordinate system.
Feature coordinate
system (G68.2)
Machine coordinate system
Workpiece coordinate system (G54)
This function is applicable to the following machine configurations.
(See above figure.)
<1> Tool rotation type machine controlled with two tool rotation
axes
<2> Table rotation type machine controlled with two table rotation
axes
<3> Mixed-type machine controlled with one tool rotation axis and
one rotary axis
The function can also be used for a machine configuration in which
the rotary axis for controlling the tool does not intersect the rotary axis
for controlling the table.
Format
- Feature coordinate system setting
G68.2 X
x0
Y
y0
Z
z0
Iα Jβ Kγ ; Feature coordinate
: system setting
G69 ; Cancels the feature
coordinate system setting.
X, Y, Z : Feature coordinate system origin
I, J, K : Euler's angle for determining the orientation of the
feature coordinate system
- Tool axis direction control
G53.1 ; Controls the tool axis direction.