
B-63662EN/01 10.FUNCTION FOR THREE-DIMENSIONAL PROCESSING SYSTEM
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10.1.2 Attitude Control B (Offset Type Head)
The offset type mechanism is configured with the α axis (fourth axis)
to rotate around Z axis, and the rotational axis β axis (fifth axis)
recorded in this α axis. It possesses the structure of being arranged
such that the rotational center line of the α axis is perpendicular to the
rotational center line of the β axis, and that the rotational center line
of the α axis does not cross the center line of the nozzle.
This type has the following characteristics:
1 When controlling the attitude of the nozzle by α and β axes, it is
necessary to command the moved amount to the X, Y, Z axes,
and to control to return to the original tip position of the nozzle,
because the tip position of the nozzle moves.
2 Because there is interference between axes, control is
complicated and contour precision is decreased.
3 The structure of the nozzle head section is simplified, and it is
easy to avoid interference with the workpiece.
4 The number of mirrors is decreased.
180° 0°
270°
90°
+Y
+X
+Z
+X
α axis
axis
Second arm
L2
Program coordinates
(X, Y, Z)
First arm
L1
Machine
coordinates
x,
, z
270° 90°
180°
0°
Rotation around the
axis
+Y
+Z
Rotation around the α axis