### Pitch/Runout Tab

Use the Pitch/Runout tab to specify the required data for the pitch measurement of a bevel gear.

Define Gear dialog box – Pitch/Runout tab for bevel gear

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

Pitch Point Definition Area

PC-DMIS Gear will measure one point on each flank to measure pitch and runout. This area defines where on the flank the point for the pitch measurement will be measured.

Type of Definition: The pitch point's location on each flank can be defined by one of the following methods:

Type A: Master Grid

A point on each flank from the master flank data is used to measure the pitch and runout.

Pitch point in master grid convex: The row and col (column) numbers for the pitch point of the master grid on the convex side.

Pitch point in master grid concave: The row and col (column) numbers for the pitch point of the master grid on the concave side.

Type B: Radius and Z Coordinate

A point on each flank defined by its polar coordinates is used to measure pitch and runout.

Radius of Pitch Point: Enter the radius of the pitch point. Gear calculates the pitch points on each flank by piercing the circle with the master flank surface.

Z Coordinate of Pitch Point: Enter the Z coordinate of the pitch point. Gear calculates the pitch points on each flank by piercing the circle with the master flank surface.

Evaluation Area

Plot Magnification: This value is a percentage that all pitch errors will be magnified by for display in the evaluation. 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 (mm/inch) Area

Define the tolerances for evaluating pitch and runout. Refer to the gear standard for a definition of each parameter.

- Cumulative pitch deviation (Fp)

- Individual pitch deviation (fp)

- Adjacent pitch deviation (fu)

- Individual pitch variation (Rp)

- Radial runout (Fr)

Note: With the measured pitch points, a runout evaluation can also be executed.

When you click this button, PC-DMIS Gear calculates the tolerances for pitch and runout evaluations based on the standard and grade specified on the Parameters tab.

Evaluate Tooth thickness: Select this check box to evaluate the chordal tooth thickness and output the result in the report. The tooth thickness is evaluated with actual pitch points.

Chord Tooth Thickness Area

Nominal: The nominal value of chord tooth thickness.

Maximum: The maximum value of tooth thickness.

Minimum: The minimum value of tooth thickness.