Enter a step increment for each pass that the roughing routine performs on the part. The interpretation of Depth of cut depends on the Constant DOC setting in the Turn/Bore document-level options.
If Constant DOC is deselected, the Depth of cut value you set is the maximum depth of cut for the feature. If the Depth of cut evenly divides the depth of your feature, your increment is used. If it results in a final pass that is quite shallow, the Depth of cut is adjusted to result in even roughing passes. For example if you have a feature that is 0.5 inches deep and specify a Depth of cut of 0.4, the feature is roughed in two even passes 0.25 inches deep instead of one pass of depth 0.4 inches and another pass with depth of 0.1 inches.
If Constant DOC is selected, the feature is cut using this depth for each pass. With Constant DOC selected, you can also list a series of depths, separated by commas, to control the depth of each cut. For example a Depth of cut specified as 0.25, 0.15, 0.1 results in the first pass being cut at 0.25 inches, the second at 0.15 inches and the remaining pass at 0.1 inches. If there are more cuts than depths specified, the last depth is repeated.