CNC Machinist Calculator UltraG81 Drill, spot drill
Fadal G-code · Mill
Feeds to Z and rapids out. The basic drill and spot drill cycle.
Format
G81 X Y Z R0 F
Addresses
| Address | What it does |
|---|---|
X Y | Hole position |
Z | Hole bottom |
R0 | R0 plane where feed starts. Must be at or below the start plane |
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 T2 M6 (1-4 DRILL)
N3 G0 G90 G54 X1. Y1. S2500 M3
N4 G43 H2 Z1. M8 (START PLANE)
…
N2 T2 M6 (1-4 DRILL)
N3 G0 G90 G54 X1. Y1. S2500 M3
N4 G43 H2 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.
- In G91 Z and R0 are incremental. Most Fadal programs run cycles in G90.
Related codes
G81 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Drilling cycle |
| Haas NGC | Drill canned cycle |
| Mazak (EIA) | Drilling cycle, spot drill |
| Okuma OSP | Drill or spot cycle |
| Mitsubishi M70 M80 | Drilling cycle |
| Brother Speedio | Drilling cycle |
| Fagor 8055 8065 | Drilling canned cycle |
| LinuxCNC Tormach | Drill cycle |
| Mach3 Mach4 | Drill cycle |
| Centroid CNC12 Acorn | Drilling cycle |
| Hurco WinMax (NC) | Drill or spot drill 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 G81 in the app All Fadal G-codes