Current Help System: PC-DMIS Vision (View Core Help)

#### Step 3: Measure Features for Datum A

The top plane
(Datum A) will be used for the primary alignment datum. A reference plane is commonly not required in 2D vision measurements. However, in this example, the datum plane will be measured to accommodate dimensioning flatness. This is useful in situations where you might have feature control frames that reference a datum plane.

Since the approximate location of the part is known, PC-DMIS can operate in DCC mode.

If you are using a DCC machine, select DCC Mode from the Probe Mode toolbar. Otherwise, you can use AutoShutter to measure using a manual machine.

To measure a plane features for Datum A:

1. Select the Magnification tab and adjust the magnification so it is increased to the maximum setting (zoomed in).

2. Select the tab.

3. Position the camera over the part.

4. From the Illumination tab adjust the Top Light to a value that makes the surface visible but not too bright. Move Z to focus as necessary.

5. Select the tab.

6. Select Scale-To-Fit from the Graphics Modes toolbar.

7. Select the Surface Mode button from the Graphics Modes toolbar.

8. Click the Surface Point button from the Auto Feature toolbar. This opens the Auto Feature (surface point) dialog box.

9. Click a point on the top surface.

10. Select the Hit Targets tab and change the following parameters: Target Type = Automatic Hit Target, Range = 5.0, Duration = 5, and Hi-Accuracy = YES. For each Automatic Hit Target, double-click the value below the value and type the specified value.

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11. Click Create to add this edge point to the part program.

12. Click a another point on the top surface, the click Create.

13. Repeat the step above (Click a point, then Create) until a total of 8 points have been created (PNT2 - PNT9).

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

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