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G73 High speed deep hole drilling / Longitudinal grooving compound cycle
Okuma OSP G-code · Mill, Lathe
On mills: High speed deep hole drilling
Pecks the drill with a short retract to break chips, not a full retract. Good for steel where chips string.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | R point |
Q | Peck depth |
F | Feed rate |
How it works
Modal, fixed cycle group. Cancel with G80.
Example program
N1 G15 H1 (WORK COORDINATE SYSTEM 1)
N2 G00 G90 X1. Y1. S2000 M03 (FIRST HOLE)
N3 G56 Z1. H2 M08 (LENGTH OFFSET)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Chips stay in the hole. Use G83 for deep holes.
- Return level comes from M52, M53 or M54.
On lathes: Longitudinal grooving compound cycle
Pecks a groove or a wide groove in steps along X with shifts. One block cuts the whole groove.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
Addresses
| Address | What it does |
|---|---|
X Z | Target point |
I | Shift in X, diameter |
K | Shift in Z |
D | Depth of cut per peck |
DA | Retract amount |
L | Total infeed before a full withdrawal, diameter |
F | Feed rate |
E | Dwell at the X target |
T | Tool offset used at the target point |
How it works
Compound fixed cycle. One shot.
Example program
N1 G50 S3000 (MAX SPINDLE 3000 RPM)
N2 G00 X2.2 Z-1. T050505 (.125 GROOVE TOOL)
N3 G97 S800 M03 (800 RPM)
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- E dwell uses the same unit as G04 F.
- Without L the full withdrawal motion is skipped.
Related codes
G73 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | High speed peck drilling |
| Haas NGC | High speed peck drilling cycle |
| Mazak (EIA) | High speed peck drilling |
| Mitsubishi M70 M80 | High speed peck drilling |
| Brother Speedio | High speed peck drilling |
| Heidenhain TNC (ISO) | Rotation of the coordinate system |
| Fagor 8055 8065 | Pattern rotation |
| LinuxCNC Tormach | Chip breaking drill cycle |
| Mach3 Mach4 | High speed peck drill |
| Centroid CNC12 Acorn | High speed peck drilling cycle |
| Hurco WinMax (NC) | High speed peck drilling |
| Fadal | Peck drill, chip break |
| Swiss (Citizen Star) | Pattern repeat cycle |
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