This parameter indicates the type of roughing motion used to remove material from within pockets in the part.
Spiral
Pocket Cut Spiral cutting consists of outwardly offset tool moves, parallel to the material boundary, from the "center" of the pocket out to the part. When the tool nears the part, the moves become parallel to the part profile.
Zig Zag
Pocket Cut Zig Zag cutting consists of offset parallel linear moves in the interior of the pocket up to the part profile, in the direction of a vector you will define. These moves are followed by a single contour move parallel to, and along the pocket profile.