Siemens SINUMERIK 840D sl Programming Manual page 7

Table of contents
Preface.........................................................................................................................................................3
1 Fundamental Geometrical Principles ........................................................................................................13
1.1 Workpiece positions .................................................................................................................. 13
1.1.1 Workpiece coordinate systems .................................................................................................. 13
1.1.2 Cartesian coordinates ................................................................................................................ 14
1.1.3 Polar coordinates ....................................................................................................................... 17
1.1.4 Absolute dimensions ................................................................................................................. 18
1.1.5 Incremental dimension .............................................................................................................. 20
1.2 Working planes.......................................................................................................................... 22
1.3 Zero points and reference points............................................................................................... 23
1.4 Coordinate systems................................................................................................................... 25
1.4.1 Machine coordinate system (MCS) ........................................................................................... 25
1.4.2 Basic coordinate system (BCS) ................................................................................................. 28
1.4.3 Basic zero system (BZS) ........................................................................................................... 30
1.4.4 Settable zero system (SZS) ....................................................................................................... 31
1.4.5 Workpiece coordinate system (WCS) ........................................................................................ 32
1.4.6 What is the relationship between the various coordinate systems? .......................................... 32
2 Fundamental Principles of NC Programming ............................................................................................33
2.1 Name of an NC program ........................................................................................................... 33
2.2 Structure and contents of an NC program................................................................................. 35
2.2.1 Blocks and block components ................................................................................................... 35
2.2.2 Block rules ................................................................................................................................. 37
2.2.3 Value assignments .................................................................................................................... 38
2.2.4 Comments ................................................................................................................................. 39
2.2.5 Skipping blocks .......................................................................................................................... 40
3 Creating an NC program ...........................................................................................................................43
3.1 Basic procedure......................................................................................................................... 43
3.2 Available characters .................................................................................................................. 45
3.3 Program header......................................................................................................................... 47
3.4 Program examples .................................................................................................................... 49
3.4.1 Example 1: First programming steps ......................................................................................... 49
3.4.2 Example 2: NC program for turning ........................................................................................... 50
3.4.3 Example 3: NC program for milling ............................................................................................ 52
4 Tool change ..............................................................................................................................................55
4.1 Tool change without tool management...................................................................................... 56
4.1.1 Tool change with T command ................................................................................................... 56
4.1.2 Tool change with M6 ................................................................................................................. 57
4.2 Tool change with tool management (option) ............................................................................. 59
4.2.1 Tool change with T command with active tool management (option) ........................................ 59
Fundamentals
Programming Manual 09/2011, 6FC5398-1BP40-2BA0
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