HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 41)

HEIDENHAIN TNC 128 41
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Program layout
NC programs should be arranged consistently in a similar manner. This
makes it easier to find your place, accelerates programming and
reduces errors.
Recommended program layout for simple, conventional contour
machining
1 Call tool, define tool axis
2 Retract the tool
3 Pre-position the first axis in the working plane in front of the
contour starting point
4 Pre-position the second axis in the working plane next to the
contour starting point
5 In the tool axis, position the tool above the workpiece, or
preposition immediately to workpiece depth. If required, switch on
the spindle/coolant
6 Approach the contour
7 Machine the contour
8 Depart the contour
9 Retract the tool, end the program
Further information on this topic:
 Contour programming: See "Fundamentals" on page 160
Recommended program layout for simple cycle programs
1 Call the tool, define the tool axis
2 Retract the tool
3 Define the machining positions
4 Define the fixed cycle
5 Call the cycle, switch on the spindle/coolant
6 Retract the tool, end the program
Further information on this topic:
 Cycle programming: See "Working with fixed cycles" on page 364.
Example: Layout of contour machining programs
0 BEGIN PGM BSPCONT MM
1 BLK FORM 0.1 Z X... Y... Z...
2 BLK FORM 0.2 X... Y... Z...
3 TOOL CALL 5 Z S5000
4 Z+250 R0 FMAX
5 X... R0 FMAX
6 Y... R0 FMAX
7 Z+10 R0 F3000 M13
...
16 X... R0 FMAX
17 Z+250 R0 FMAX M2
18 END PGM BSPCONT MM
Example: Cycle program layout
0 BEGIN PGM BSBCYC MM
1 BLK FORM 0.1 Z X... Y... Z...
2 BLK FORM 0.2 X... Y... Z...
3 TOOL CALL 5 Z S5000
4 Z+250 R0 FMAX
5 PATTERN DEF POS1( X... Y... Z... ) ...
6 CYCL DEF...
7 CYCL CALL PAT FMAX M13
8 Z+250 R0 FMAX M2
9 END PGM BSBCYC MM