HEIDENHAIN TNC 620 Programming Station

Fundamentals | Creating and entering NC programs
3
3.5 Creating and entering NC programs
Structure of an NC program in HEIDENHAIN Klartext
An NC program consists of a series of NC blocks. The illustration at
right shows the elements of an NC block.
The control numbers the NC blocks of an NC program in ascending
sequence.
The first NC block of an NC program is identified by BEGIN PGM, the
program name, and the active unit of measure.
The subsequent NC 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
NC block
90
HEIDENHAIN | TNC620 | Klartext Programming User's Manual | 01/2022