Heidenhain TNC 320 (77185x-01) ISO programming User Manual Page 87

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Opening programs and entering 3.2
3
TNC 320 | User's Manual for DIN/ISO Programming | 3/2014
87
3.2 Opening programs and entering
Organization of an NC program in DIN/ISO format
A part program consists of a series of program blocks. The figure at
right illustrates the elements of a block.
The TNC numbers the blocks of a part program automatically
depending on machine parameter blockIncrement (105409). The
machine parameter blockIncrement (105409) defines the block
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!
Block number
Path function
Words
Block
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