The tool offset sensor allows you to automatically enter the length of the tool in the CNC toolholder or directly in the spindle chuck. The machine automatically measures the tool length, then corrects the Z-axis coordinate so that the tooltip is at the correct compensation height. On machines equipped with automatic tool changer, the measurement can be performed once or before each use. It is also possible to measure the tool after machining to check its parameters and to see if it is damaged or still in a proper working condition.