Programming instructions

3-22
Motion Commands, Dimension Inputs NC Programming 17VRS
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
3.9 Mirror Imaging of Coordinate Axes 'G72' / 'G73'
The programmable mirror function permits the mirror imaging of any de-
sired coordinate axes within a machining program. When a coordinate
axis is mirror imaged, the original contour is machined symmetrically op-
posite in the same size and at the same distance on the other side of the
mirror imaging axis.
The activation and deactivation of mirror imaging preparatory G-function
is programmed using the Preparatory G-functions in the part program.
The mirror function can be activated via G73. It remains latched until it is
canceled by G72 or until it is automatically reset at the end of the program
(RET, M002/M030) or by BST. G72 sets all mirror imaging axes back to
the default position.
G73 <axis name>-1
Mirror function ON
G72
Cancel mirror function for all axes
The following rule applies to the mirror imaging of an axis:
•
The signs of the coordinates of the mirror imaged axis are inter-
changed.
•
In the case of circular interpolation the direction of rotation is switched.
(G02
→
G03, G03
→
G02)
•
The machining direction of the path correction is reversed (G41
→
G42,
G42
→
G41)
The following rules apply to mirror imaging two axes in a single plane:
•
The signs of both mirror-imaged coordinates are interchanged (X-Y,
Z-X, Y-Z)
•
In the case of circular interpolation the direction of rotation remains the
same.
•
The machining direction of the path correction remains the same.
The zero offsets G54...G59, G52 and the adjustable offset are not mirror
imaged. The programmable zero offsets G50 and G51 are also mirror
imaged in programming after the mirror image function has been se-
lected.
•
The Preparatory G-functions for mirror imaging are assigned to Pre-
paratory G-function group 18.
•
Selecting mirror imaging does not result in any axis movement. The
tool path correction and NC-block lookahead are terminated when mir-
ror imaging is selected. Tool lengths are not mirror imaged.
•
When main axes are mirror imaged, the workpiece is always mirror
imaged.
•
The position display shows the corresponding workpiece coordinates.
Syntax
Mirroring one axis
Mirroring two axes