This chapter provides fundamental information on working with position displays. Here you will learn interesting facts on dimensions, the operating principle of linear encoders or how position displays compensate different tool geometries.

Datums Datums project the drawing dimensions on the workpiece       Angle Reference Axis Angle reference axes define the starting point of an angle measurement       Tool Compensation Position displays can take into account tool geometries for turning or milling	Absolute / Incremental Position Position data can refer to different starting points       Reference Marks Reference marks allow you to restore the correct slide position display after a power interruption       Summary Overview of the contents of this chapter