This section of the analysis log shows the recommended shrinkage allowance value, which is the average isotropic shrinkage for the entire part.
The predictive error associated with this value is also displayed. This predictive error represents a confidence band for the shrinkage prediction and is calculated as the average error in predictions based on the standard deviations calculated for the shrinkage testing data.
If the distribution of shrinkage across the part is uniform across each critical dimension, then this value can be used to cut the mold. The Shrinkage check plot result can be used to graphically examine whether it is feasible to apply this recommended shrinkage allowance to the entire part.
This table shows the recommended shrinkage allowances along the X, Y and Z axes of the part, and the overall recommended shrinkage allowance as above.
The validity range for a given component is calculated by applying the predicted % tolerance to the recommended shrinkage allowance for that component.
The predicted tolerance is the predictive error plus the error associated with the variation in shrinkage across the part. This error may be different in each component direction, and over the entire part.
The final column shows the range of predicted shrinkage values in each component direction and across the part. The minimum value of the shrinkage range for a given direction may be zero if some region of the part has no shrinkage in that direction.