Measuring Commands; The Coordinate System; Machine Coordinate System (G53) - Siemens SINUMERIK 808D Programming And Operating Manual

Calculation of the thread lead change
If you already know the starting and final lead of a thread, you can calculate the thread lead change to be programmed
according to the following equation:
The identifiers have the following meanings:
K2e: Thread lead of axis target point coordinate in [mm/U]
K2a: Initial thread pitch (progr. under I,J and K) in [mm/U]
IG: Thread length in [mm]
3.3

Measuring commands

3.3.1

The coordinate system

The position of a tool is defined uniquely through its coordinates in the coordinate system. These coordinates are defined by
the axis positions. For instance, if the two axes involved are named as X and Z, then the coordinates are specified as follows:
X... Z...
Tool position specified with X... Z..:
The following coordinate systems are used for specifying the coordinates:
● Machine coordinate system (G53)
● Workpiece coordinate system (G50)
● Local coordinate system (G52)
3.3.1.1

Machine coordinate system (G53)

Defining the machine coordinate system
The machine coordinate system MCS is defined with the machine zero. All other reference points refer to the machine zero.
The machine zero is a fixed point of the machine tool, to which all (derived) measuring systems can be traced back.
Format
G53 X... Z... ;
X, Z: absolute dimension word
Programming and Operating Manual (ISO Turning/Milling)
01/2017
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