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M6 Tool change

Heidenhain TNC (ISO) M-code · Mill

Tool change and spindle stop. Whether it stops the program depends on machine parameters. On most TNC machines the tool change happens with the tool call block.

Format

Addresses

Address	What it does
`M6`	No addresses

How it works

Non-modal. Acts at end of block.

Example program

N70 G00 Z+250 M6 *
N80 T2 G17 S4000 *
N90 G01 G40 Z+10 F5000 *

Example is in inch. Check offsets and clearances first.

Watch out for

Many TNC machines do not need M6 because T G17 S already changes the tool. Follow the machine builder setup.

Related codes

M6 on other controls

The same number can mean something different on another control.

Control	Meaning
Fanuc	Tool change
Haas NGC	Tool change
Doosan (Fanuc)	Atc tool change command
DMG Mori MAPPS (Fanuc)	Tool change
Mazak (EIA)	Chuck unclamp (releasing workpiece)
Okuma OSP	Tool Change
Mitsubishi M70 M80	Tool change
Brother Speedio	Tool change
Siemens 840D 828D	Tool change
Fagor 8055 8065	Tool change
LinuxCNC Tormach	Tool change
Mach3 Mach4	Tool change
Centroid CNC12 Acorn	Tool change
Hurco WinMax (NC)	Tool change
Fadal	Tool change
Swiss (Citizen Star)	Main chuck close (Citizen)

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Open M6 in the app All Heidenhain TNC M-codes

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