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G51.1 Programmable mirror image

Brother Speedio G-code · Mill

Mirrors the program about a line on the listed axis. One axis mirror flips arc and comp direction.

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

Format

G51.1 X Y

Addresses

Address	What it does
`X Y`	Mirror line position

How it works

Modal. Cancel with G50.1.

Example program

G51.1 X0 (MIRROR ABOUT X0)
M98 P3000 (RUN SHAPE)
G50.1 X0 (MIRROR OFF)

Example is in inch. Check offsets and clearances first.

Watch out for

Mirror turns climb milling into conventional milling.

Related codes

G50.1 · M98

G51.1 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Programmable mirror image
Mitsubishi M70 M80	Mirror image on
Hurco WinMax (NC)	Mirror image
Fadal	Mirror image

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Open G51.1 in the app All Brother Speedio G-codes

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