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Figure 14: Five imbedded loops for 3-face blade calculation

The algorithm of iterations and approximation loops in Figure 7 becomes now
even more complex in order to achieve the desired goal of re-establishing the
original blade spacing. Two additional outer loops have to be added (Figure
14). The first added loop (loop No. 4) repeats all previously discussed calcula-
tion loops for both blades, involved in cutting one pinion or gear slot (“Inside &
Outside Blade Loop” in Figure 14). The additional outer loop (Loop No. 5) will
calculate the actual blade spacing angle (which required that both IB- and OB-
blade calculation have been finished at this point) and processes this value in
order to decide, which blade (inside or outside) has to receive what amount of
additional front clean-up thickness DSx. The corrective repetition of all four in-
ner loops uses a dampened amount of DSx (reduced amount). All inner loops
are repeated as described in the section “Blade Parameter Definitions and
Geometry Calculation”.

The outer blade spacing iteration loop repeats the calculations, until the actual-
ly achieved blade spacing deviation from the original (desired) spacing is be-
low a defined iteration limit, or if the deviation value changes its sign (or it

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