13. Program Support Functions
13.6 G Command Mirror Image
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Precautions
CAUTION
Turn the mirror image ON and OFF at the mirror image center.
If mirror image is canceled at a point other than the mirror center, the absolute value and machine
position will deviate as shown below. (In this state, execute the absolute value command
(positioning with G90 mode), or execute reference position return with G28 or G30 to continue the
operation.) The mirror center is set with an absolute value, so if the mirror center is commanded
again in this state, the center may be set to an unpredictable position.
Cancel the mirror at the mirror center or position with the absolute value command after canceling.
Absolute value (position
commanded in program)
Machine position
When moved with the incremental
command after mirror cancel
Issue mirror cancel command here
Issue mirror axis command here
Mirror center
Combination with other functions
(1) Combination with radius compensation
The mirror image (G51.1) will be processed after the radius compensation (G41, G42) is
applied, so the following type of cutting will take place.
Programmed path
When only radius
compensation is applied
Mirror center
When only mirror image
is applied
When both mirror image and
radius compensation are applied