HEIDENHAIN TNC 620 E, User Manual

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Fundamentals, File Management | Creating and writing programs
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HEIDENHAIN | TNC 620 | Conversational Programming User's Manual | 10/2017
4.2 Creating and writing programs
Structure of an NC program in HEIDENHAIN Klartext
A machining program consists of a series of NC blocks. The
illustration on the right shows the elements of a block.
The control numbers the blocks of a part program in ascending
order.
The first block of a program is identified by
BEGIN PGM
, the
program name and the active unit of measure.
The subsequent blocks contain information on:
The workpiece blank
Tool calls
Approaching a safe position
Feed rates and spindle speeds, as well as
Path contours, cycles and other functions
The last block of a program is identified by
END PGM
, the program
name and the active unit of measure.
NOTICE
Danger of collision!
The control does not automatically check whether collisions can
occur between the tool and the workpiece. There is danger of
collision during the approach movement after a tool change!
If necessary, program an additional safe auxiliary position
Block number
Path functions Words
Block