HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 48)

48 NC programming
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m section code
LATERAL_Y section
The section code identifies the YZ plane (G19). For machines equipped
with a B axis, it defines the tilted plane.
Without tilted plane: The reference diameter defines the contour
position in the X direction; the C axis angle defines the position on the
workpiece.
With tilted plane (see figures): SURFACE_Y additionally performs the
following transformations and rotations for the tilted plane:
 Shifts the coordinate system to the position I, K
 Rotates the coordinate system by the angle B; reference point: I, K
 H=0: Shifts the rotated coordinate system by –I. The coordinate
system is moved "back."
Shifting "back" coordinate system: The control evaluates the
reference diameter for the cutting limit. This value is also used as the
reference value for the depth that you program for drilling operations
and milling contours.
Since the reference diameter is referenced to the current zero point,
it is recommended when working in a tilted plane, to shift the rotated
coordinate system "back" by the distance –I. If the cutting limits are not
needed, for example for drilling holes, you can disable the shift of the
coordinate system (H=1) and set the reference diameter to 0.
Example: "SURFACE_Y"
HEADER
...
CONTOUR Q1 X0 Z600
BLANK
...
FINISHED PART
...
SURFACE_Y X118 C0 B130 I59 K0
...
MACHINING
...
X
H=0 B, I, K
–K
I
Z
B
H=1
–I
Z
B
X
Z
B
X
Parameter
X
Reference diameter
C C axis angle—Defines the spindle position
Parameter
X
Reference diameter
C C axis angle—Defines the spindle position
B Plane angle: Positive Z axis
I Plane reference in X direction (radius)
K Plane reference in Z direction
H Automatic shift of the coordinate system (default: 0)
 0: The rotated coordinate system is shifted by –I
 1: The coordinate system is not shifted
Please note:
 X is the infeed axis in a tilted coordinate system. X
coordinates are entered as diameter coordinates.
 Mirroring the coordinate system has no effect on the
reference axis of the tilt angle ("B axis angle" of the tool
call).