### Topography Tab

Use the Topography tab to define all the values necessary for the description of the topography measurement. Topography measurement uses single point probing to take measurements. PC-DMIS Gear automatically generates all probing points and the machine movement.

Define Gear dialog box – Topography tab for bevel gear

Measure: Select this check box to measure the topography of the gear.

Measurement Area

Teeth List to be measured: The box to the right of the list specifies the tooth numbers for which the topography will be measured based on the Number of Teeth value on the Parameters tab. The list defines for how many teeth the topography will be measured. By default, the profile will be measured on four teeth. The following options are available in the list:

- All: Measures all of the teeth. When you select this option, the teeth range automatically appears in the box, and you cannot change the value.

- Custom: Measures only the teeth that you type in the box. Separate the teeth with commas. For example: 1,8,14,20. An out-of-range error symbol will flash to the right of the box if the value that you enter in the box is out of range based on the Number of Teeth value on the Parameters tab.

- 1, 2, 4, and 8: Enables PC-DMIS Gear to automatically calculate the teeth to measure. The teeth automatically appear in the box, and you cannot change the value.

Flank selection: Select whether to measure the Concave Flank, Convex Flank, or Both Flanks:

A - Convex
B - Concave

Evaluation Area

Plot Magnification: Define the scale of magnification scale for the plot. If you specify "0", the evaluation is carried out, but no plot output will be created. However, the evaluation parameters are stored in the measurement result.

Tolerances Area

Enter the appropriate tolerances according to the blueprint.

Total deviation: The total tolerance for all grid points.

Line at face: The tolerance for the face line.

Line at root: The tolerance for the root line.

Profile at toe: The tolerance for the profile at the toe line.

Profile at heel: The tolerance for the profile at the heel line.

The graphic below provides an example of the topography tolerances and shows how the tolerance values are reported in the footer.