Siemens SINUMERIK 840Di sl Programming Manual page 549

Workpiece coordinate system
The workpiece coordinate system has its starting point in the → workpiece zero. In machining
operations programmed in the workpiece coordinate system, the dimensions and directions
refer to this system.
Workpiece zero
The workpiece zero is the starting point for the → workpiece coordinate system. It is defined
in terms of distances to the → machine zero.
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Glossary
549