Position Of Zero Points - Siemens SINUMERIK 840Di sl Programming Manual

Fundamental Geometrical Principles

1.2 Position of zero points

Working planes
The working planes are specified as follows in the NC program with G17, G18 and G19:
Level
X/Y
Z/X
Y/Z
1.2 Position of zero points
The various origins (zero points) and reference positions are defined on the NC machine.
They are reference points
• for the machine to approach and
• for programming the workpiece dimensions.
The diagrams show the zero points and reference points for drilling/milling machines and
turning machines.
Milling:
22
Designation
G17
G18
G19
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Infeed direction
Z
Y
X
Fundamentals