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

## Creating an Auto Corner Point

The Corner Point measurement option allows you to define a point measurement that is the intersection of three measured planes. This measurement type allows you to measure the intersection of three planes without measuring the planes separately and constructing an intersection point. Nine hits (three hits on each of the three planes) must be used to measure a corner point.

To access the Corner Point option, access the Auto Feature dialog box for a Corner Point (Insert | Feature | Auto | Point | Corner).

Auto Feature dialog box - Corner Point

With the dialog box open, depending on your situation, use one of these methods to create the feature:

Creating by Using Surface Data on the Screen

To generate a corner point using surface data:

1. Click on the Surface Mode icon .

2. Using the mouse, click once near the corner. You'll notice PC-DMIS automatically re-positions the animated probe on the corner point.

3. Verify that the correct corner point is selected. The dialog box will display the value of the selected corner point and vector once the point has been indicated.

4. Make any other modifications to the dialog box and the Probe Toolbox as needed.

5. Click Create.

Creating by Using Surface Data with the CMM

To generate a corner point using surface data with the CMM:

1. Touch once on each of the three surfaces that converge on the corner. PC-DMIS assumes that the surfaces are mutually perpendicular.

2. Make any other modifications to the dialog box and the Probe Toolbox as needed.

3. Click Create.

If the CAD corner point is not found, PC-DMIS will display the closest point and ask that additional hits be taken.

The Find Noms option should be selected from the Mode list for this measurement method. See the "Mode List" topic in the PC-DMIS Core documentation for additional information on nominals.

Creating by Using Wire Frame Data on the Screen

Wire frame CAD data can also be used to generate a corner point.

To generate the point:

1. Using the mouse, click once near (but not on) the corner. PC-DMIS will highlight the selected surface.

2. Verify that the correct surface has been selected. The dialog box will display the value of the selected corner point and vector once the point has been indicated. (If necessary, touch on a different edge, leading into the corner.)

3. Make any other modifications to the dialog box and the Probe Toolbox as needed.

4. Click Create.

Creating by Using Wire Frame Data with the CMM

To generate a corner point using wire frame data with the CMM:

1. Touch twice on the first surface.

2. Touch once near the edges that converge on the corner. PC-DMIS assumes that the surfaces are mutually perpendicular. If the CAD corner point is not found, PC-DMIS will display the closest point and ask that additional hits be taken.

3. Make any other modifications to the dialog box and the Probe Toolbox as needed.

4. Click Create.

The Find Noms option should be selected from the Mode list for this measurement method. See the "Mode List" topic in the PC-DMIS Core documentation for additional information on nominals.

Creating without Using CAD Data

To generate a corner point without the use of CAD data:

1. Touch three times on the first surface.

2. Touch two times on the second surface.

3. Touch once on the third surface.

4. Make any other modifications to the dialog box and the Probe Toolbox as needed.

5. Click Create.

Creating by Keying in the Data

This method allows you to key in the desired X, Y, Z, I, J, K values for the corner point.

1. Type in the desired X, Y, Z, I, J, K values for the feature into the dialog box.

2. Click Create to insert the feature into your part program.

See the "Mode List" topic in the PC-DMIS Core documentation for additional information on nominals.