#### Define K-Chart for Profile or Helix/Lead

Define K-Chart dialog box

This dialog box appears when you click the Define K-Chart button from the Profile or Helix/Lead tabs. You can use this dialog box to define the type of K-Chart (standard or modified) and to modify tooth tip tolerance values.

If you use a modified K-Chart the Modified K-Chart Definition area becomes enabled so you can add in your own diameters and tolerance values. The Preview area also changes to include additional display fields. Any customized diameters or tolerances appear in the Preview area.

For a definition of the K-Chart and more complete information, consult the gear standard.

Dialog Box Items

Use Standard K-Chart: This uses a standard K-Chart. See the gear standard for more information.

Use Modified K-Chart: Sometimes you have some specific requirements for the K-Chart and you need to change from the standard K-Chart. In this case, this check box makes custom modification of the K-Chat available. See the gear standard for more information.

Modified K-Chart Definition Area: This area contains items to help you work with a modified K-Chart. It allows you to define a corner point in your K-Chart by specifying a diameter and tolerance pair. In the K-Chart diagram in this dialog box, the tolerance is in the X axis and the diamter is in the Y axis. You need to add in many tolerance and diameter pairs (corner points) into the K-Chart.

Diameter: This is the radial position to define the tolerance.

Tolerance: This is the tolerance value in the position of some "Diameter".

Add: This adds a diameter and tolerance pair (a corner point) in the modified K-Chart. Values should be within the Start of Evaluation Range (near root) and the End of Evaluation Range (near tip) values of located in the Evaluation area of the Profile or Helix/Lead tab. If you enter values that are out of range, a message box will let you know.

Clear: This clears the selected diameter and tolerance pair.

Clear All: This clears all the diameter and tolerance pairs defined in the list box.

Modify Tooth Tip Tolerance: Sometimes you need to measure a tip-relief gear. Marking this check box lets you redefine the shape in the tip area of the tooth. You must select the Use Standard K-Chart option button to use this check box.

The Diameter on "OD": This defines the diameter for "OD" shown on the right side of the diagram. This item becomes enabled only if you mark Modify Tooth Tip Tolerance.

The Diameter on "A": This defines the diameter for "A" shown on the right side of the diagram. This item becomes enabled only if you mark Modify Tooth Tip Tolerance.

Total Tolerance at Tip: This defines the total tolerance at tip areas. This item becomes enabled only if you mark Modify Tooth Tip Tolerance.

Tolerance Offsets at Tip: This defines the tolerance offset value at tip areas. This item becomes enabled only if you mark Modify Tooth Tip Tolerance.

Preview Area: A diagram of the K-Chart is displayed here and is modified when you change K-Chart parameters. This lets you preview changes made.