Share
 
 

To create a Point-Cloud Cone item

To measure a cone within a point cloud:

  1. Open a Geometric group in the Sequence Tree.
  2. Click Geometry tab > Features panel > 3D > Point-Cloud Cone.
Note: Point-cloud items are available only when creating inspections for CNC and Manual machines.

The Point Cloud Cone dialog contains the following areas:

Name — Enter a name for the item. The name is used in the inspection sequence, in the Report and Info tabs, and when referencing the item in other items.

Use nominals — Select this check box to enter or change the item nominals, and to compare the item measurements to their nominal values. Deselect this check box to disable comparisons with the item nominals.

When this check box is selected, an in-tolerance or out-of-tolerance indicator is displayed on the measured item's icon in the inspection sequence; the border of the item label is coloured to indicate whether the measurements are within tolerance; and the tolerance, nominal, deviation, and error values of the item are shown in the report.

When this check box is deselected, the Nominal boxes are disabled, no tolerance indicators are displayed and no tolerance, nominal, deviation, and error values are shown in the report for this item.

Note: To load the nominals from the CAD model, click and select From CAD Entity. To replace the nominals with the item's measurements in the current Measure, click the button and select From Active Measure.

Visible — Select this check box to display the item in the CAD view.

Output in report — Select this check box to include the item in the report.

Coordinate system — Select the alignment relative to which the item's measurements are to be reported.

To specify the alignment during the inspection, select <Active Alignment>. You can then select the alignment from the Active alignment list, or by adding an Active Alignment item to the inspection sequence.

Evaluate from nominal — Select this check box to limit the search for the feature to the region around its nominal position. Deselect this check box to search the whole point-cloud for the feature.

Search distance — Enter a value in the box to specify the maximum distance from the nominal position of the feature that you want PowerInspect to search.

Half angle — Enter the nominal size and tolerances of the angle formed by the axis of the cone and its surface.

Conicity — Specify the Maximum acceptable difference between the points with greatest positive deviation and greatest negative deviation from the best-fit cone. If the difference between the greatest positive deviation and the greatest negative deviation exceeds the Maximum value, the conicity is out-of-tolerance.

To measure conicity, PowerInspect first calculates the best-fit cone through the points. It then runs two coaxial cones through the points furthest from the best-fit cone in each direction. The Conicity value is the distance between the coaxial cones.

Direction vector — Specify the direction of the feature and its tolerance. The direction of the vector is from the large circle at the base of the cone to the small circle near its apex.

Base point — Enter the coordinates of the centre of the feature's base.

Radius — Enter the radius of the base of the feature.

Height — Enter the height of the feature.

Point sources — Select this tab to use points from other items to measure this item.

Select an option to specify the sources containing the points you want to use:

    • None — Specifies no items as sources.
    • Individual items — Displays all available Point-Cloud items in the Available sources list. To specify an item as a source, select it, and then click to add it to the Selected sources list. To remove an item from the Selected sources list, select it, and then click . If you are measuring a 3D feature such as a sphere or cone, deselect the Display point-clouds only check box to list all available items in the inspection sequence.
    • All point-clouds — Specifies all available Point-Cloud items as sources. PowerInspect automatically selects this option when you extract features from point-clouds using the Geometry Explorer.
    • All items — Specifies all items in the inspection sequence as sources. This option is available only for 3D features.

Click OK to close the dialog and save your changes.

Was this information helpful?