Rotation G68/G69 - Siemens Sinumerik 840D sl Programming Manual

3.1.10 3D rotation G68/G69
The G code G68 is extended for 3D rotation.
Format
G68 X.. Y.. Z.. I.. J.. K.. R..
X.. Y.. Z..:
I.. J.. K..:
R..:
The 2D or 3D rotation differentiation takes place only through the programming of the vector
I, J, K. If there is no vector in the block, G68 2DRot is selected. If there is a vector in the
block, G68 3DRot is selected.
If a vector is programmed with the length 0 (I0, Y0, K0), the Alarm 12560 "Programmed
value outside the permissible limits" is triggered.
Two rotations can be switched one after the other with G68. If so far no G68 is active in a
block containing G68, then the rotation is written to the channel-specific basic frame 2. If
G68 is already active, the rotation is written to the channel-specific basic frame 3. Thus, both
rotations follow one another.
The 3D rotation is ended with G69. If two rotations are active, both are deselected with G69.
G69 must not be alone in the block.
ISO Milling
Programming Manual, 06/09, 6FC5398-7BP10-1BA0
Coordinates of the pivot point related to the current workpiece zero. If no
coordinate is programmed, the pivot point lies in the workpiece zero. The
value is always interpreted as absolute. The coordinates of the pivot point
act as a work offset. G90/G91 in the block does not affect the G68
command.
Vector in pivot point. The coordinate system is rotated around this vector at
angle R.
Angle of rotation. The angle of rotation is always absolute. If no angle is
programmed, the angle from the setting data 42150
$SA_DEFAULT_ROT_FACTOR_R is active. G68 must be alone in the block.
Motion commands
3.1 The coordinate system
45