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G89 Boring cycle, dwell, feed out
LinuxCNC Tormach G-code · Mill
Feeds to Z, dwells P seconds, then feeds out. Good for counterbores and flat bottom bores.
Format
G89 X Y Z R P [L] F
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | Retract plane where feed starts |
L | Repeat count, used with G91 |
F | Feed rate |
P | Dwell in seconds |
How it works
Modal, motion group. Cancel with G80 or another motion code.
Example program
G20 G17 G40 G49 G54 G80 G90 G94 (INCH, SAFE START)
T8 M6 G43 (BORING BAR)
S800 M3
G0 X1 Y1 Z0.5
…
T8 M6 G43 (BORING BAR)
S800 M3
G0 X1 Y1 Z0.5
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- P is seconds.
- L repeats the hole. In G91 each repeat steps by X Y. L0 is not allowed.
Related codes
G89 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Boring cycle, dwell and feed out |
| Haas NGC | Boring cycle, dwell and feed out |
| Mitsubishi M70 M80 | Boring cycle with dwell, feed out |
| Brother Speedio | Boring cycle with dwell feed out |
| Fagor 8055 8065 | Boring, feed withdrawal |
| Mach3 Mach4 | Bore, dwell, feed out |
| Centroid CNC12 Acorn | Boring cycle with dwell |
| Hurco WinMax (NC) | Bore with dwell, feed out |
| Fadal | Bore in, dwell, bore out |
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