For Volume and Local milling, the amount of material removed using the Automatic option is defined by the milling volume and depends on the PROF_STOCK_ALLOW parameter value. All material inside the volume will be removed, with the offset equal to the PROF_STOCK_ALLOW value left on the sides and bottom.

For Pocketing, the amount of material removed automatically also depends on the PROF_STOCK_ALLOW parameter value. All material along the surfaces selected for machining will be removed, with the offset equal to the PROF_STOCK_ALLOW value left on the sides and bottom.

When Automatic material removal is performed for a Conventional milling or Contouring surface milling NC sequence, as well as for Plunge milling, the surface(s) are offset by stock allowance (if applicable) and the side walls are built towards the retract plane. Note that stock allowance is added at all the surface edges as well. This result is then subtracted from the workpiece.

The following illustration shows the tool path and automatic material removal for Conventional milling.

Automatic material removal for Profile milling is defined by the tool geometry and the trajectory of the last profiling pass.

Automatic material removal for Face milling removes all material above the surface selected for facing.

Automatic material removal for an Engraving NC sequence will produce a line corresponding to the reference groove. Neither the width nor the depth of the cut will be reflected.

Automatic material removal is not available for Roughing, Reroughing, Trajectory, and Thread milling.