Opening Programs And Entering; Structure Of An Nc Program In Din/Iso Format - HEIDENHAIN TNC 620 User Manual

3
Fundamentals, file management
3.2

Opening programs and entering

3.2 Opening programs and entering

Structure of an NC program in DIN/ISO format

A machining program consists of a series of NC blocks. The
illustration on the right shows the elements of a block.
The TNC numbers the blocks of a part program automatically
depending on machine parameter
machine parameter
number increment.
The first block of a program is identified by %, 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 N99999999, the
program name and the active unit of measure.
After each tool call, HEIDENHAIN recommends
always traversing to a safe position from which the
TNC can position the tool for machining without
causing a collision!
126
blockIncrement
blockIncrement (105409) defines the block
Block
(105409). The
Block number
HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
Words
Path function