Tool setting

Abstract

In a CNC turning centre, the distance from the spindle datum to the turret datum is a known fixed value, but this value is not easily used within a part program. The distance from the tool tip to the work datum is a much more usable value. To determine this distance you have to take into account the Z axis setting value and the X axis setting value. These values position the tool tip in relation to the turret datum in the X and Z axes (Figure 9.1). (Milling tools are catered for in the part program by the tool length offset and the cutter diameter compensation facilities.)