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G03 Counterclockwise arc, Cartesian
Heidenhain TNC (ISO) G-code · Mill
Cuts a counterclockwise arc to the end point around the circle center I J, or with radius R. Klartext: C X Y DR+ around CC, or CR X Y R DR+.
Format
G03 X Y [Z] [R] [F]
Addresses
| Address | What it does |
|---|---|
X Y | End point of the arc |
R | Arc radius, used instead of a circle center |
I J | Circle center, programmed in its own block before the arc |
F | Feed rate |
How it works
Modal path function.
Example program
N50 G01 G41 X+5 Y+5 F300 *
N60 G26 R5 F150 *
N70 X+60 *
N80 G03 X+90 Y+35 R+30 *
…
N60 G26 R5 F150 *
N70 X+60 *
N80 G03 X+90 Y+35 R+30 *
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- With G41 on an inside contour, counterclockwise arcs mean climb milling.
- Check the sign of R for arcs over 180 degrees on your control before running.
Related codes
G03 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Circular interpolation counterclockwise |
| Haas NGC | Circular interpolation counterclockwise |
| Mazak (EIA) | Circular interpolation, counterclockwise |
| Okuma OSP | Circular interpolation counterclockwise |
| Mitsubishi M70 M80 | Circular move counterclockwise |
| Brother Speedio | Circular interpolation counterclockwise |
| Siemens 840D 828D | Circular interpolation counterclockwise |
| Fagor 8055 8065 | Counterclockwise circular interpolation |
| LinuxCNC Tormach | Counterclockwise arc or helix |
| Mach3 Mach4 | Counterclockwise arc |
| Centroid CNC12 Acorn | Counterclockwise arc or helix |
| Hurco WinMax (NC) | Circular or helical move counterclockwise |
| Fadal | Circular interpolation counterclockwise |
| Swiss (Citizen Star) | Circular move counterclockwise |
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