Nc Blocks Of The Din/Iso Program - HEIDENHAIN CNC PILOT 640 User Manual

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NC blocks of the DIN/ISO program

An NC block contains NC commands such as positioning, switching
or organizational commands. Traversing and switching commands
begin with G or M followed by a number (G1, G2, G81, M3, M30, ...)
and the address parameters. Organizational commands consist of
(WHILE , RETURN, etc.) or of a combination of letters/
key words
numbers.
You can also program NC blocks containing only variable calculations.
You can program several NC commands in one NC block, provided
they have different address letters and
functions.
Examples:
Permissible combination: N10 G1 X100 Z2 M8
Non-permissible combination: N10 G1 X100 Z2 G2 X100 Z2 R30
– same address letters are used more than once or N10 M3 M4 –
opposing functionality
To describe workpiece blanks
G20 "Blank part macro" for standard parts (cylinder, hollow
cylinder)
G21 "Cast-part macro" for blank-part contours based on finished-
part contours G21 is only used for describing workpiece blanks
Individual contour elements (such as are used for finished-part
contours) where use of G20 or G21 is not possible
NC address parameters
letters followed by:
A value
A mathematical expression
A question mark (VGP simplified geometry programming)
A letter i to designate incremental address parameters (examples:
Xi..., Ci..., XKi..., YKi..., etc.)
A # variable
A constant (_constname)
Examples:
X20 [Absolute dimension]
Zi–35.675 [Incremental dimension]
X? [Simplified geometry programming]
X#l1 [Variable programming]
X(#g12+1) [Variable programming]
X(37+2)*SIN (30) [Mathematical expression]
X(20*_pi) [Expression with constant]
236
do not have opposing
and auxiliary workpiece
– the address parameters consist of 1 or 2
DIN/ISO programming | Programming in ISO Mode
blanks, use:
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017