### Auto Align

The Auto Align button allows you to select three features from which PC-DMIS will automatically create an alignment. The order in which the three features are selected is extremely important.

- The first of the three features will be used to establish the orientation of the normal axis to the current working plane.

- The current working plane will then be rotated to the second feature.

- Lastly, the part origin will be set according to the third feature type.

For example, if you select a:

Plane, Line and a Point with a ZPLUS workplane:
The plane will establish the ZPLUS orientation of the part. The measured line becomes the XPLUS major axis. The origin is set with the Z zero equal to that of the plane. The Y is equal to that of the line and the X is equal to that of the point.

Plane, Line and a Measured Circle with a YMINUS workplane:
The plane will establish the YMINUS orientation of the part. The measured line becomes the ZMINUS major axis. The origin is set with the Y zero equal to that of the plane. The X and Z zeros (origins) are equal to the center of the circle.

If PC-DMIS is unable to create a new alignment based on the three selected features, a pop-window will appear with an error message.

Important: In an Auto Alignment the origin of the alignment is based on the third feature used.
¨ If it's a point, PC-DMIS sets the axes origin. If not, PC-DMIS checks the feature's default axes.
¨ If it's an Auto Line, PC-DMIS returns X, Y, and Z and sets the origin on the X, Y, and Z.
¨ If it's a Measured Line, PC-DMIS determines which axis the approach vector most closely follows and then zeros out the other two axes.
¨ If it's an Auto Circle, PC-DMIS sets all three axes.
¨ If it's a Measured Circle, PC-DMIS looks at the workplane and only sets two axes.