HEIDENHAIN TNC 320 User Manual page 124

4.11 Programming Examples
Example: Thread milling
The drill hole coordinates are stored in the point
table TAB1.PNT and are called by the TNC with
CYCL CALL PAT.
The tool radii are selected so that all work steps
can be seen in the test graphics.
Program sequence
Centering
Drilling
Tapping
0 BEGIN PGM 1 MM
1 BLK FORM 0.1 Z X+0 Y+0 Z-20
2 BLK FORM 0.2 X+100 Y+100 Y+0
3 TOOL CALL 1 Z S5000
4 L Z+10 R0 F5000
5 SEL PATTERN "TAB1"
6 CYCL DEF 200 DRILLING
Q200=2 ;SET-UP CLEARANCE
Q201=-2 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGN
Q202=2 ;PLUNGING DEPTH
Q210=0 ;DWELL TIME AT TOP
Q203=+0 ;SURFACE COORDINATE
Q204=0 ;2ND SET-UP CLEARANCE
Q211=0.2 ;DWELL TIME AT DEPTH
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Definition of workpiece blank
Call tool: centering drill
Move tool to clearance height (enter a value for F)
The TNC positions to the clearance height after every cycle
Definition of point table
Cycle definition: CENTERING
0 must be entered here, effective as defined in point table
0 must be entered here, effective as defined in point table
Fixed Cycles: Tapping / Thread Milling