Rough

Rough the part leaving stock in Z and X for finish paths.

Figure 8.29: Roughing

Rules for Roughing

• Start away from the face of the part.

• A common practice is to use the same tool for both facing and OD roughing when possible.

• Leave a constant thickness of material over the part for the finishing operation.

• Skip over grooves and other features that will be rough or finished with other tools and operations.

• Consider moving the tool vertically at the end of each path to remove scallops.

• Extend the path past the back of the part for cutoff tool clearance.