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Figure 3: Second level modification on flank surfaces

These numbers can be changed during a fine tuning of the MicroForm results. The
items MF15 and MF16 provide a vertical shift of the function in Figure 3 at the toe
or heel. If the item MF17 is entered not equal to zero, then the angle entered is
used instead of the center roll position. The last three MicroForm input items are
transferred from the dimension sheet of the particular gear design.

17.3 Parameter Optimizations - MicroForm

In general, gear manufacturers aim to reduce the noise, vibration and harshness
(NVH) of a gearset when considering psychoacoustic effects. It is recommended
to start with MicroForm and use the proposed input parameters given in Figure 2.
If the single flank variation and FFT results and the audible noise do not improve,
then the parameters MF2, MF3, MF4 and MF5 should be changed according to
Figure 4.

Figure 4: MicroForm input items for first iteration step

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