G03 Circular interpolation, counterclockwise

Mazak (EIA) G-code · Mill

Cuts a counterclockwise arc in the active plane. Same addresses as G02.

Format

G03 X Y [Z] I J [K] F or G03 X Y R F

Addresses

Address	What it does
`X Y Z`	Arc end point
`I J K`	Arc center, incremental from the start point
`R`	Arc radius
`F`	Feed rate

How it works

Modal, group 01.

Example program

G90 G54 G00 X2. Y0. (START POINT)
G43 H03 Z.1 (LENGTH OFFSET)
G01 Z-.1 F10. (FEED DOWN)
G03 X-2. Y0. R2. F20. (HALF CIRCLE, R 2.)
…

The full 5-line example is in the app. Example is in inch. Check offsets and clearances first.

Watch out for

With G41 climb milling an inside pocket wall is cut with G03.
If the end point is not on the arc the control alarms or blends the error. Check I and J math.

Related codes

G02 · G41

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
Okuma OSP	Circular interpolation counterclockwise
Mitsubishi M70 M80	Circular move counterclockwise
Brother Speedio	Circular interpolation counterclockwise
Siemens 840D 828D	Circular interpolation counterclockwise
Heidenhain TNC (ISO)	Counterclockwise arc, Cartesian
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

Every G-code for Mazak (EIA) 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 G03 in the app All Mazak G-codes

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