Siemens SINUMERIK 802D Programming And Operating Manual page 159

Coordinate systems for grinding
In general, CNC grinding machines have separate coordinate systems for grinding and
dressing. The zero points of both coordinate systems must be defined once when setting up
the machine.
The workpiece zero is defined by the operator when setting up the machine by scratching
the workpiece in all necessary axes. All additional geometric specifications for creating the
automatic program refer to this zero point.
The dresser zero is defined during setup by scratching the wheel with the dressing
diamonds. It serves as a reference point for the dressing program.
Figure 9-1
Plane definition
Before using the grinding cycles, G507 must be activated. Typically, the infeed axis is the
first geometry axis.
A tool length compensation must be selected before the cycle is called. It is always effective
at the selected level and remains active even after the end of the cycle.
Types of grinding wheels
The cycles support two types of grinding wheels: vertical and inclined wheels.
During machining, the wheel feeds only in X or Z direction.
Cylindrical grinding
Programming and Operating Manual, 07/2009, 6FC5398-4CP10-2BA0
Coordinate systems for grinding
9.3 Special characteristics of grinding cycles
Cycles
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