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G41 Cutter radius compensation left / Nose radius compensation left
Okuma OSP G-code · Mill, Lathe
On mills: Cutter radius compensation left
Offsets the tool to the left of the path, looking in the direction of travel. With a right hand cutter this is climb milling.
Format
G41 G01 X Y D F
Addresses
| Address | What it does |
|---|---|
X Y | Lead in move |
D | Cutter radius offset number |
F | Feed rate |
How it works
Modal. Cancel with G40.
Example program
O1000 (OKUMA MILL SAMPLE)
N1 G15 H1 (WORK COORDINATE SYSTEM 1)
N2 G00 G90 X-1. Y-1. S3000 M03 (START OFF PART)
N3 G56 Z-.25 H1 (LENGTH OFFSET)
…
N1 G15 H1 (WORK COORDINATE SYSTEM 1)
N2 G00 G90 X-1. Y-1. S3000 M03 (START OFF PART)
N3 G56 Z-.25 H1 (LENGTH OFFSET)
…
The full 7-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- Turn it on with a linear move longer than the tool radius.
- D is the radius offset number. H is used for length with G56.
On lathes: Nose radius compensation left
Offsets the tool nose to the left of the path. Normal for boring toward the chuck.
Format
G41
How it works
Modal. Cancel with G40.
Example program
O2000 (OKUMA LATHE SAMPLE)
N1 G50 S3000 (MAX SPINDLE 3000 RPM)
N2 G00 X1. Z.1 T030303 (BORING BAR)
N3 G41 G01 X1.25 Z0 F.006 (COMP ON)
…
N1 G50 S3000 (MAX SPINDLE 3000 RPM)
N2 G00 X1. Z.1 T030303 (BORING BAR)
N3 G41 G01 X1.25 Z0 F.006 (COMP ON)
…
The full 6-line example is in the app. Example is in inch. Check offsets and clearances first.
Watch out for
- The nose radius and tip direction come from the tool data for the T code.
Related codes
G41 on other controls
The same number can mean something different on another control.
| Control | Meaning |
|---|---|
| Fanuc | Cutter compensation left |
| Haas NGC | Cutter compensation left |
| Mazak (EIA) | Cutter radius compensation left |
| Mitsubishi M70 M80 | Cutter radius comp left |
| Brother Speedio | Cutter compensation left |
| Siemens 840D 828D | Tool radius compensation left |
| Heidenhain TNC (ISO) | Radius compensation left |
| Fagor 8055 8065 | Tool radius compensation left |
| LinuxCNC Tormach | Cutter compensation left |
| Mach3 Mach4 | Cutter comp left |
| Centroid CNC12 Acorn | Cutter compensation left |
| Hurco WinMax (NC) | Cutter compensation left |
| Fadal | Cutter radius compensation left, climb |
| Swiss (Citizen Star) | Nose radius compensation left |
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