HEIDENHAIN TNC 620 User Manual page 27

3 Programming: Fundamentals, File Management........................................................................99
3.1 Fundamentals...................................................................................................................................... 100
Position encoders and reference marks............................................................................................... 100
Reference system................................................................................................................................. 100
Reference system on milling machines................................................................................................101
Designation of the axes on milling machines.......................................................................................101
Polar coordinates...................................................................................................................................102
Absolute and incremental workpiece positions.................................................................................... 103
Selecting the datum..............................................................................................................................104
3.2 Opening programs and entering....................................................................................................... 105
Organization of an NC program in HEIDENHAIN conversational format.............................................. 105
Define the blank: BLK FORM............................................................................................................... 106
Opening a new part program............................................................................................................... 109
Programming tool movements in conversational dialog....................................................................... 110
Actual position capture..........................................................................................................................112
Editing a program..................................................................................................................................113
The TNC search function...................................................................................................................... 116
3.3 File management: Basics................................................................................................................... 117
Files....................................................................................................................................................... 117
Displaying externally generated files on the TNC.................................................................................119
Data backup...........................................................................................................................................119
HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2015
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