The Normalize Weighting button provides access to a dialog that offers options to equalize the influence of relationships on the fit.
By default, each relationship is weighted the same, an equal value of one. However, these values can be adjusted to increase or decrease the relative “pull” within the optimization process for each relationship. Weighting can be controlled by 2 factors:
Equation Count. A point to surface relationship is a singe vector or equation, whereas a point-to-point relationship applies in X, Y, and Z and is in effect 3 equations. You can normalize the weighting between relationships such that the number of equations are equalized.
Tolerance Width. This allows you to adjust the fit providing greater weight to features with tighter tolerances. Taking advantage of available tolerances may allow a part to pass that would fail when all features are handled equally.
Weights can be normalized based upon the following options:
Normalize on Equation Count. This option sets weighting inversely proportional to the number of equations, equalizing the pull from a relationship with more points to that of a relationship with less.
Normalize on Equation Count and Tolerance. This option takes into account both equation count and tolerance width and sets the weight accordingly.
Rest All Weights to 1.0. This option allows the weights to be rest.
Normalize on Square Root of Equation Count. The inverse of the sqrt(N) where N = number of equations for relationship fit computation. This is very similar to the first option but used the square root of N. There is some argument that this is a better weighting solution for balancing the pull from two relationships.
Normalize on Square Root of Equation Count and Tolerance Width. Same as the second option but uses the square root of the equation count.