### Tip/Root Circle Tab

This tab lets you specify the required data for the measurement of the Tip circles and Root circles. Tip/Root
measurement is optional; if you don’t want to measure the Tip/Root, deselect the Measure option. All the values in the Measurement Parameters areas are required for measurement.

Gear Definition dialog box – Tip/Root tab for cylinder gears

This tab contains two areas, the Tip Circle Measurement Parameters area and the Root Circle Measurement Parameters area. The definition of the boxes for both areas is given below:

Measure: When this check box is selected, the Tip/Root will be measured during the measurement process based on the parameters defined on the Tip/Root tab. Tip/Root
measurement is optional.

Tip Circle Measurement Parameters Area

The Tip Circle is the circle measured by taking points on the tips of teeth, For an external it is major diameter and for an internal gear it is minor diameter.

Number of Teeth to Measure: This value is the number of teeth of the gear on which you want to measure the Tip circle. The teeth measured will be as close to equally spaced around the gear as possible starting with tooth #1. Default value is 0. This value must be greater than 0 in order to select the Measure option that will actually cause Tip/Root measurement to be executed.

Teeth to be measured: Click Edit to open the Edit Tooth list to be measured dialog box.

Edit tooth list to be measured dialog box

Create the tooth list by typing each tooth number that will be included separated by a comma. The number of teeth listed should be the same as the Number of Teeth to Measure value. For example, if you want to measure the profile for Tooth #1, #8, #14, and #20 just input 1,8,14,20 in this edit box. This value will not affect segmented gears; however, be sure not to define a non-existing tooth number. Click OK to save the tooth list or Cancel to close without saving.

Z Coordinate of Measurement: This is the Z coordinate value where the Tip points should be measured. This value is usually negative.

Diameter of Tip Circle: This value is the theoretical diameter of the Tip circle.

Upper Tolerance: This value is the upper tolerance for the diameter of the measured Tip circle.

Lower Tolerance: This value is the lower tolerance for the diameter of the measured Tip circle.

Important: It should be noted that the tip circle and root circle are virtually reversed for internal gears. The tip circle will be the smaller diameter and the root circle will be the larger diameter.

Root Circle Measurement Parameters Area

The Root circle is the circle measured by taking points on the root space between two adjacent gear teeth.

Number of Teeth to Measure: This value is the number of teeth of the gear on which you want to measure the Root circle. The teeth measured will be as close to equally spaced around the gear as possible starting with tooth #1. Default value is 0. This value must be greater than 0 in order to select the Measure option that will actually cause Tip/Root measurement to be executed.

Teeth to be measured: Click Edit to open the Edit Tooth list to be measured dialog box. See the value with the same name in the Tip Circle Measurement Parameters area above for an detailed description and example.

Z coordinate of Measurement: This is the Z coordinate value where the Root points should be measured. This value is usually negative.

Diameter of Root Circle: This value is the theoretical diameter of the Root circle.

Upper Tolerance: This value is the upper tolerance for the diameter of the measured Root circle.

Lower Tolerance: This value is the lower tolerance for the diameter of the measured Root circle.