Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
2-1
Fundamental Principles of NC Programming
2
2.1 Structure and contents of an NC program
Note
DIN 66025 is the guideline for designing a parts program.
An (NC/part) program consists of a sequence of NC blocks (see table below). Each data
block represents one machining step. Instructions are written in the blocks in the form of
words. The last block in the execution sequence contains a special word for the end of
program: M2, M17 or. M30.
Set Word Word Word ... ;Comment
Set N10 G0 X20 ... ;1st Set
Set N20 G2 Z37 ... ;2nd Set
Set N30 G91 ... ... ;...
Set N40 ... ... ...
Set N50 M30 ... ... ;End of program (last block)
Program names
Each program has a different name; the name can be chosen freely during program creation
(except for punch tape format), taking the following conditions into account:
• The first two characters must be letters (or a letter with an underscore character)
• other letters, digits
Example:
_MPF100 or
SHAFT or
SHAFT_2
Only the first 24 characters of a program identifier are displayed on the NC.
Punch tape format
File names:
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