Tolerance - Point Features

Geomet applies tolerance in either Linear and True Position, including RFS, MMC and LMC when applicable. To understand the basics of tolerance, please refer to Introduction to Tolerance in Geomet.

Activating the tolerance tool

To activate the tolerance tool directly from the report, highlight the Point feature by left clicking on it. Activate the feature sub menu by right clicking and select the [Edit Tolerance] command. To activate the tolerance tool using keyboard short keys, press <Ctrl + t> which activates a dialog where the feature number is entered, see figure 1. In either method, the appropriate tolerance dialog is displayed with the current tolerance data displayed. For additional information see Working with Geomet Tolerance Windows.

figure 1, Enter Feature Number

Tolerance of 1D Point features is limited to Cartesian / Linear. Thus, 1D Points only offer bilateral tolerance inputs, see figure 2.

figure 2, Tolerance 1D Points

To apply tolerance nominal values, start by entering the nominal value in the column labeled "Nominal". Enter the Plus and Minus values for the bilateral tolerance band. Press the <Ok> button on the dialog or the <Enter> key on the keyboard.

Tolerance of 2D Point features is possible in either Cartesian or Polar reporting formats and in either Linear or RFS formats.

figure 3, Cartesian format	figure 4, Polar format
figure 5, GDT Tolerance Cartesian Format	figure 6, GDT Tolerance Polar Format

To activate the tolerance tool  see Working with Geomet Tolerance Windows

In figure 3 an example of Cartesian format is shown. Figure 4 shows an example of the Polar format and figure 5 and 6 shows the RFS Positional Tolerance format.

Tolerance of 3D Point features is possible in either Cartesian or Polar reporting formats and in either Linear or RFS formats.

figure 7, Cartesian format	figure 8, RFS GDT format
figure 9, Polar Format

To activate the tolerance tool  see Working with Geomet Tolerance Windows

In figure 7 an example of Cartesian format is shown. Figure 9 shows an example of the Polar format and figure 8 shows the RFS Positional Tolerance format.

Tolerance of Vector Point features is possible only in Cartesian reporting formats. In addition to standard tolerance, Vector Points are evaluated where they exist in a profile band that surrounds the inspection piece.

figure 10, Profile Band	figure 11, Sub Menu

To activate the tolerance tool  see Working with Geomet Tolerance Windows, see figure 10. Here we show the standard tolerance dialog for assigning values to the Nominal XYZ position, Profile Band and Probe Deviation plus/minus values.

When Vector Points were measured, the complete Tolerance data was inserted as part of the reported feature. However, you may elect to update the Tolerance data on one or more features.

It is efficient to update the profile band limits on multiple Vector Point features with just one operation. To accomplish this, highlight all the Vector Point features in the report that share a common profile band limit and right-click to activate the sub menu. Choose [Edit VP Profile] and the standard "Vector Point Profile Band" dialog will appear. You can then enter new plus/minus values for the Profile Band and Probe Deviation. When accepted, all highlighted Vector Point features will reflect the new values.

Since this method works on multiple Vector Point features, the Nominal XYZ data fields will be protected and no changes can be made.

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Related Procedures:

Points, System Options, Out-of-Tolerance Flash Message