HEIDENHAIN TNC 620 Programming Station, User Manual

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First Steps with the TNC 620
1.3 Programming the first part
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
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 tool in the working plane near the contour starting
point
4 In the tool axis, position the tool above the workpiece, or
preposition immediately to workpiece depth. If required, switch on
the spindle/coolant
5 Contour approach
6 Contour machining
7 Contour departure
8 Retract the tool, end program
Further information on this topic
Contour programming
Further Information: "Programming tool movements for
workpiece machining", page 238
Layout of contour machining
programs
%BSPCONT G71 *
N10 G30 G71 X... Y... Z...*
N20 G31 X... Y... Z...*
N30 T5 G17 S5000*
N40 G00 G40 G90 Z+250*
N50 X... Y...*
N60 G01 Z+10 F3000 M13*
N70 X... Y... RL F500*
...
N160 G40 ... X... Y... F3000 M9*
N170 G00 Z+250 M2*
N99999999 BSPCONT G71 *
Recommended program layout for simple cycle programs
1 Call tool, define tool axis
2 Retract the tool
3 Define the fixed cycle
4 Move to the machining position
5 Call the cycle, switch on the spindle/coolant
6 Retract the tool, end program
Further information on this topic
Cycle programming
Further information: Cycle Programming User's Manual
Cycle program layout
%BSBCYC G71 *
N10 G30 G71 X... Y... Z...*
N20 G31 X... Y... Z..*
N30 T5 G17 S5000*
N40 G00 G40 G90 Z+250*
N50 G200...*
N60 X... Y...*
N70 G79 M13*
N80 G00 Z+250 M2*
N99999999 BSBCYC G71 *