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G26 Tangential approach on an arc
Heidenhain TNC (ISO) G-code · Mill
Approaches the first contour point on a tangential arc of radius R. Program it right after the block that moves to the first contour point with G41 or G42. Klartext counterpart: RND after the first contour point, or APPR CT.
Format
G26 R [F]
Addresses
| Address | What it does |
|---|---|
R | Radius of the approach arc |
F | Feed rate for the approach |
How it works
Non-modal.
Example program
N50 X-10 Y-10 *
N60 G01 Z-5 F1000 M3 *
N70 G01 G41 X+5 Y+5 F300 *
N80 G26 R5 F150 *
…
N60 G01 Z-5 F1000 M3 *
N70 G01 G41 X+5 Y+5 F300 *
N80 G26 R5 F150 *
…
The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Radius compensation must be active in the block before G26.
- Pick R so the arc has room between the start point and the part.
Related codes
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Open G26 in the app All Heidenhain TNC G-codes