Initial stock for feature collision detection

The initial stock used for collision checking depends on the strategy you have selected. This is because pocket machining strategies without a reference toolpath have no history of what has been machined in the feature hierarchy.

Strategy	Initial stock
Feature area clearance	The block is used as the initial stock.
Feature rest area clearance	A stock model, or the block and a reference toolpath, is used as the initial stock.
Feature pocket area clearance	The initial stock is the space shared by the pockets and the block. It is assumed that there are no collisions outside of the selected pockets.
Feature pocket rest area clearance	Stock model available — The stock model is used as the initial stock. Stock model unavailable — The initial stock is the space shared by the pockets and the block after a reference toolpath has been subtracted from it. It is assumed that there are no collisions outside of the selected pockets.

Warning: For feature pocket machining strategies where a stock model is unavailable, you must guarantee that the remaining stock is the same as the pocket geometry.