Table of contents
3 Fundamentals........................................................................................................................ 65
3.1 The TNC640.............................................................................................................................. 66
HEIDENHAIN Klartext and ISO........................................................................................................................... 66
Compatibility........................................................................................................................................................... 66
3.2 Visual display unit and operating panel...................................................................................... 67
Display screen........................................................................................................................................................ 67
Setting the screen layout..................................................................................................................................... 67
Operating panel...................................................................................................................................................... 68
Extended Workspace Compact.......................................................................................................................... 71
3.3 Modes of operation.................................................................................................................... 74
Manual Operation and El. Handwheel............................................................................................................... 74
Positioning with Manual Data Input.................................................................................................................. 74
Programming.......................................................................................................................................................... 75
Test Run.................................................................................................................................................................. 75
Program Run, Full Sequence and Program Run, SingleBlock..................................................................... 76
3.4 NC fundamentals........................................................................................................................ 77
Position encoders and reference marks.......................................................................................................... 77
Programmable axes.............................................................................................................................................. 77
Reference systems................................................................................................................................................ 78
Designation of the axes on milling machines................................................................................................. 90
Polar coordinates................................................................................................................................................... 90
Absolute and incremental workpiece positions.............................................................................................. 91
Selecting the preset.............................................................................................................................................. 92
3.5 Creating and entering NC programs........................................................................................... 93
Structure of an NC program in ISO format..................................................................................................... 93
Defining the workpiece blank: G30/G31........................................................................................................... 94
Creating a new NC program............................................................................................................................... 99
Programming tool movements in ISO.............................................................................................................. 100
Actual position capture........................................................................................................................................ 102
Editing an NC program........................................................................................................................................ 103
The control's search function............................................................................................................................. 107
3.6 File management........................................................................................................................ 109
Files........................................................................................................................................................................... 109
Displaying externally generated files on the control...................................................................................... 111
Directories............................................................................................................................................................... 111
Paths......................................................................................................................................................................... 111
Overview: Functions of the file manager......................................................................................................... 112
Calling the File Manager...................................................................................................................................... 113
Selecting drives, directories and files............................................................................................................... 114
Creating a new directory...................................................................................................................................... 116
Creating new file.................................................................................................................................................... 116
HEIDENHAIN | TNC640 | ISO Programming User's Manual | 10/2023 9