System information

SECTION FOUR - PREPARATORY FUNCTIONS (G CODES)
G69 zeros the rotation angle and rotation center.
Care needs to be taken when using rotation in conjunction with other functions. Functions such
as mirror image, scaling, and cutter compensation need to be carefully considered when used
together with rotations. Some of the basic rules are as follows.
1. Cutter compensation should be off (G40) when rotation is called. (Cutter compensation
can be turned on after rotation is called.)
2. If scaling is on before rotation, the rotation center will be scaled; if rotation is called
before scaling, the rotation center will not be scaled.
3. The order of on and off is first on, last off.
G51 . . . . scaling on
G68 . . . . rotation on
G41 . . . . cutter compensation on
.
.
.
G40 . . . . cutter compensation off
G69 . . . . rotation off
G50 . . . . scaling off
4. If the rotational center is scaled, it will remain scaled until replaced by a new center, or
canceled with G69.
5. Rotation is always done in the active plane.
6. X, Y, and Z can be used instead of I, J, and K for rotation center.
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