Minimum rapid distance is the lower threshold that defines when a tool move is performed by a rapid move, or just a move at the current feed rate. It applies to 2.5D milling or Z-level rough operations. The number is specified as a percentage of tool. This figure shows a boss cut with a value of 400%. Note that as the tool moves inward, there are few rapid moves. Instead, the tool is fed between passes. In this figure, Min rapid distance is set to 10% and the tool retracts and rapids between passes.