Pre-defined variables Variables DX, DY and DZ must never be declared. The CNC declares them
automatically and assigns the penal dimensions specified in the header.
Expression DX / 2 therefore always indicates the panel half in relation to X without
having to declare or assign any variable.
E.g.
G100 X DX/2 Y DY/2 P DZ/2 F2000 T”1”
The instruction makes a hole in the exact center of the panel while the depth of the
hole is half of the thickness.

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