### Master Flank Measurement

The following describes the process of measuring the Master Flank:

1. After all the parameters for the Master Flank have been set, and you have clicked Measure, you have to execute 9 manual hits in a specific order. These hits serve as a start value for the calculation of the probing points of the master grid to be measured and define the corner points of the grid.

2. Beginning near the root area of the flank, measure a row of three hits from the inside diameter (ID) to the outside diameter (OD) of the flank. Continue by measuring a second row of hits from the ID toward the OD, near the middle of the flank. Finally, measure the last row of hits along the top edge (near the tip/gear face) from the ID toward the OD. This determines the material direction.

3. You must establish a clearance position before measuring the first point and all further measurements can be taken without a clearance position.

4. PC-DMIS Gear computes the probing points for the measurement of the master grid according to the number of lines and columns based on the previously taken manual hits.

5. The points on the corner determine the size of the master grid. For the Computation of the grid points the program performs a linear interpolation of the Z coordinates and the radius according to the column and line numbers. The columns of the grid are parallel to the tooth profile and the lines are parallel to the tip of the tooth.

6. The measurement of the master flank is then executed in two automatic runs.

7. After the measurement, the program computes an average master from all measured master flanks. The computed grid points are stored in the element as NPT's in meandering columns in such a way that the first column lies inwards on the tooth flank (first point at the root) and the last column outwards.

Note: This procedure will be executed on either the Convex, Concave or Both Flanks according to the Flanks selection value in the Master Flanks Parameter dialog box. See "Defining Master Flank Data".