HEIDENHAIN iTNC 530 425
11.7 Generate a Backward Program
Application example
The contour CONT1.H is to be milled in several infeeds. The TNC
generates the forward file CONT1_fwd.h and the backward file
CONT1_rev.h.
NC blocks
...
5 TOOL CALL 12 Z S6000
Tool call
6 L Z+100 R0 FMAX
Retract in the tool axis
7 L X-15 Y-15 R0 F MAX M3
Pre-position in the plane, spindle on
8 L Z+0 R0 F MAX
Approach the starting point in the tool axis
9 LBL 1
Set a mark
10 L IZ-2.5 F1000
Infeed depth in incremental values
11 CALL PGM CONT1_FWD.H
Call the forward program
12 L IZ-2.5 F1000
Infeed depth in incremental values
13 CALL PGM CONT1_REV.H
Call backward program
14 CALL LBL 1 REP3
Repeat program part three times starting with block
9
15 L Z+100 R0 F MAX M2
Retract tool, end of program