#### Step 1: Manually Measure Datum Features

The manual alignment in this example will consist of an Arc and a Line. These datum features will be more accurately re-measured in "Step 3: Re-measure the Datum Features". Before you begin, mount the part so it is reasonably square to the axes of the measuring machine.

To measure the datum features:

1. Select the Magnification tab and adjust the magnification so it is decreased to the minimum setting (zoomed out).

With a manual (approximate) alignment, leaving the magnification at the minimum is acceptable and usually desirable since it is easier to run the program. The DCC alignment (refined) alignment will later improve the quality of these datum features.

2. Select the Illumination tab and set the Top Light to 0% (Off)and the Bottom Light to 35%.

3. Click the Circle button from the Auto Feature toolbar. This opens the Auto Feature (circle) dialog box.

4. Select the tab.

5. Move the machine so the Arc (Datum B) is within the FOV.

6. Click three points spaced along the edge of the arc. A radial target will be overlaid on the arc as shown below:

7. Click Create to add this circle to the part program.

8. Select Line from the drop-down list box of the Auto Feature dialog box.

9. Move the machine so the Edge (Datum C) ,adjacent to the previously measured arc, is within the FOV.

10. Click two points - One on the left end and one on the right end. A line target will be overlaid on the edge as shown below:

11. Click Create to add this line to the part program.

12. Click Close to exit the Auto Feature dialog box.

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