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G209 Tapping with chip breaking
Heidenhain TNC (ISO) G-code · Mill
Rigid tapping that backs out partly after each chip breaking depth. Good for tough or stringy material. Klartext: CYCL DEF 209 TAPPING W. CHIP BRKG.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G209 Q200 Q201 Q239 Q203 Q204 Q257 Q256 Q336
Addresses
| Address | What it does |
|---|---|
Q239 | Pitch, sign sets hand |
Q257 | Depth for chip breaking |
Q256 | Retract distance for chip breaking |
How it works
DEF active. Runs only with G79, M99 or M89.
Example program
N50 G209 TAPPING W. CHIP BRKG
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q239=+1.5 ;PITCH
…
Q200=2 ;SET-UP CLEARANCE
Q201=-20 ;DEPTH
Q239=+1.5 ;PITCH
…
The full 8-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Q257=0 means no chip breaking.
Related codes
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Open G209 in the app All Heidenhain TNC G-codes