M6 Tool change

Siemens 840D 828D M-code · Mill and lathe

Changes to the tool selected with T. The D number activates the tool offset. On many lathes the turret indexes on T alone without M6, set by machine data.

Format

T M6 or T D M6

Addresses

Address	What it does
`T`	Tool number or tool name, for example T="DRILL10"
`D`	Offset number of the tool, D1 if not written on most machines

How it works

Non modal.

Example program

G0 SUPA Z0 D0 ; Z TO MACHINE ZERO
T="DRILL10" ; SELECT TOOL BY NAME
M6 ; CHANGE TOOL
D1 ; OFFSET ON

Example is in inch. Check offsets and clearances first.

Watch out for

Move to a safe position before M6. The tool change sequence is written by the machine builder.
With tool management, T can be a name in quotes.

Machine builders set many M codes, and they change by model and options. Check the M code list for your machine.

Related codes

M3 · M1

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
Heidenhain TNC (ISO)	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)

Every M-code for Siemens 840D 828D 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 M6 in the app All Siemens 840D 828D M-codes

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