Turning Operation Videos Turning Operations Introduction: These videos demonstrate the basic Turn and Mill-Turn operations. Setting Tool Block Zerol, WC Offsets and Turning a Chess Piece These videos demonstrate the use of Mill-Turn to setup stock, WC zeros, Tool Offsets and the turning of a chess piece on the Mill. Mill-Turn Y and Center Tool XY Offsets These videos demonstrate the use of probing in the Lathe mode to find and set XY offsets for center tools.