G51 Scaling on

Okuma OSP G-code · Mill

Enlarges or reduces the programmed geometry around a center point. Used to cut the same shape at a different size.

Verify on your machine. This entry could not be fully checked against the maker manual. Check your machine manual before you run it.

Format

G51 X Y [Z] P

Addresses

Address	What it does
`X Y Z`	Scaling center
`P`	Scale factor, check the manual for the format

How it works

Modal. Cancel with G50.

Example program

O1000 (OKUMA MILL SAMPLE)
N1 G15 H1 (WORK COORDINATE SYSTEM 1)
N2 G51 X0 Y0 P.5 (HALF SIZE, FORMAT TO VERIFY)
N3 CALL O100 (CUT THE SHAPE)
…

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

Watch out for

Cutter compensation values are not scaled. Check the result on a dry run.
Cancel scaling before the next tool.

Related codes

G50

G51 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Scaling
Haas NGC	Scaling
Mazak (EIA)	Scaling on
Mitsubishi M70 M80	Scaling on
Brother Speedio	Scaling on
Heidenhain TNC (ISO)	Tool preselection
Mach3 Mach4	Scaling and mirror
Centroid CNC12 Acorn	Scaling and mirroring on
Hurco WinMax (NC)	Scaling
Fadal	Ramp slope control

Every G-code for Okuma OSP 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 G51 in the app All Okuma OSP G-codes

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