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G73 High speed peck drill
Mach3 Mach4 G-code · Mill
Peck drills with a short retract to break chips, not a full retract. Q is the peck depth.
Format
G73 X Y Z R Q [L] F
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R | Retract plane |
Q | Peck depth, positive |
L | Repeat count |
F | Feed rate |
How it works
Modal, canned cycle group. Cancel with G80.
Example program
G0 G20 G90 G54 G17 G40 G49 G80 (SAFE START, INCH)
T2 M6 (1-4 DRILL)
S2500 M3 (SPINDLE ON)
G0 X1.0 Y-1.0 (FIRST HOLE)
…
T2 M6 (1-4 DRILL)
S2500 M3 (SPINDLE ON)
G0 X1.0 Y-1.0 (FIRST HOLE)
…
The full 9-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Mach3 sets the chip break pullback in the G73 Pullback DRO on the Settings screen. Mach4 retracts .100 inch.
- Q must be positive and not zero.
- Cancel with G80 on its own line. A left over cycle drills at the next XY move.
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 |
| Okuma OSP | High speed deep hole 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 |
| 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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