Siemens SINUMERIK 802D sl Programming And Operating Manual page 17

Figure 1-3
Figure 1-4
The origin of this coordinate system is the machine zero.
This point is only a reference point which is defined by the machine manufacturer. It does not
have to be approachable.
The traversing range of the machine axes can be in the negative range.
Surface grinding
Programming and Operating Manual, 11/2012, 6FC5398-5CP10-3BA0
MCS for grinding (cylindrical grinding machine, surface grinding machine)
Machine coordinate system
Description
1.5 Coordinate systems
17