Reference Points On The Machine And Workpiece - Siemens SINUMERIK 840D sl Programming Manual

1.4

Reference points on the machine and workpiece

General information
Depending on the measuring task, measured values may be required in the machine
coordinate system (MCS) or in the workpiece coordinate system (WCS).
For example: It may be easier to ascertain the tool length in the machine coordinate system.
Workpiece dimensions are measured in the workpiece coordinate system.
Where:
● M = machine zero in the machine coordinate system
● W = workpiece zero in the workpiece coordinate system
● F = Tool reference point
Reference points
The position of tool reference point F in the machine coordinate system is defined with
machine zero M as the machine actual value.
The position of the tip/cutting edge of the active tool in the workpiece coordinate system is
displayed with the workpiece zero W as workpiece actual value. For a workpiece probe, the
center or the end of the probe ball can be defined as the tool tip.
The work offset (WO) characterizes the position of the workpiece zero W in the machine
coordinate system.
Work offsets (WO) comprise the components offset, rotation, mirroring and scaling factor
(only the global basis work offset does not contain any rotation).
Measuring cycles
Programming Manual, 02/2011, 6FC5398-4BP40-0BA0
1.4 Reference points on the machine and workpiece
Description
13