### Probe Shaft Method

For a portable arm device, you would follow this procedure to measure a point on a top surface using the probe shaft for probe compensation:

1. Place the probe on the top surface with the probe shaft straight up (perpendicular to the surface) from the point location (B). The point will be compensated in the direction (A) of the probe shaft.

Correct Position Incorrect Position

2. Press the Hit button.

3. Press the Done button. Notice the measured point has been added to the Edit Window.

4. With the point high-lighted, press F9 to open the Measured Point dialog box.

Measured Point Example showing hit vector pointing up.

5. Notice the IJK values in the example are generally pointing up (0,0,1). These values should generally coincide with the surface vector at the point's location.

Important: Care should be taken to hold the probe normal to (perpendicular) the surface when probing single points.