Use the Single Point Circle item to create a point at the centre of a circle when the probe is too big for the hole.
To create a Single Point Circle item:
- Open a Geometric group in the Sequence Tree.
- Click Geometry tab > Features panel > Circles > Single Point Circle.
The Single Point Circle 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.
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.
Reference plane — Select the plane on which you want to project the probe centre.
Alternatively, click 
to select the plane from the CAD view using the mouse.
Centre — Enter the nominal and tolerances for the position of the centre point.
Diameter — Enter the nominal and tolerances for the diameter or radius of the circle.
Offset/Thickness — By default, the feature is projected onto the reference plane. To specify the position of the feature relative to the reference plane, enter its average height. To calculate the average height of the feature from the measurement, select the Calculate from measurement check box.
Point sources — Select this tab to use probed points from other items to measure this item.
For example, you can use the tab to create a measured cylinder by combining measurements from probed circles at the top and bottom of the feature.
To specify the sources for the probed points, select one or more items in the
Available sources list, and then click
to add them to the Selected
sources
list.
To remove sources, select the items in the
Selected sources list, and then click
.
Click OK to close the dialog and save your changes.
When you run the item, PowerInspect displays the Feature Probing dialog. Probe the hole you want to use to create the single point circle, then click the dialog's OK button. PowerInspect creates two points:
- A single point circle calculated by projecting the probed point onto the reference plane.
- A point at the position of the probe centre when you trigger the probe.