CNC Machinist Calculator UltraG73 Peck drill, chip break
Fadal G-code · Mill
Pecks Q deep with a small lift to break the chip, without leaving the hole. Use it for shallow holes in stringy material.
Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.
Format
G73 X Y Z R0 Q [I] [J] [K] F
Addresses
| Address | What it does |
|---|---|
Z | Hole bottom |
R0 | R0 plane where feed starts. Must be at or below the start plane |
Q | Peck depth |
I J K | First peck, reduction per peck, smallest peck |
F | Feed rate |
How it works
Modal fixed cycle. Cancel with G80.
Example program
N1 G0 G40 G49 G80 G90 G17 (FORMAT 2 SAFE START)
N2 T3 M6 (1-4 DRILL)
N3 G0 G90 G54 X1. Y1. S2000 M3
N4 G43 H3 Z1. M8 (START PLANE)
…
N2 T3 M6 (1-4 DRILL)
N3 G0 G90 G54 X1. Y1. S2000 M3
N4 G43 H3 Z1. M8 (START PLANE)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Fadal calls the R plane R0. Write R0+.1, not R.1.
- Restate R0 on each cycle line even if it did not change.
- For deep holes use G83, which pulls out to clear chips.
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 |
| Mach3 Mach4 | High speed peck drill |
| Centroid CNC12 Acorn | High speed peck drilling cycle |
| Hurco WinMax (NC) | High speed peck drilling |
| Swiss (Citizen Star) | Pattern repeat cycle |
Every G-code for Fadal in your pocket. The app has the full example programs, search by number or shop word, a line decoder and calculators for tapping, threading and drilling.
Open G73 in the app All Fadal G-codes