Back to GSM Code List

M51-M56/M61-M66: Integrated M-code relays

Turns internal M-code relays or outputs on/off for fixtures, robots or peripherals.

For reference only: syntax changes with the control, the post-processor and the machine parameters. Check the official manual and run a simulation before cutting. Legal notice.

Family
Automation
Machine
Milling, Turning, Mill-turn, Laser/cut
Risk
High
Example
M51 / M61
E.g.:
M51 / M61

Machine: Milling, Turning, Mill-turn, Laser/cutRisk: High

Haas · Fanuc

  • Haas: On Haas they can control built-in M-code relays.
  • Fanuc: On Fanuc it depends entirely on the builder's ladder/PLC.

Other codes in Automation

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does M51-M56/M61-M66 mean in a CNC program?

Turns internal M-code relays or outputs on/off for fixtures, robots or peripherals. In the catalogue it appears as "Integrated M-code relays", within the Automation family.

Can you give me an example of M51-M56/M61-M66?

M51 / M61 — Turns internal M-code relays or outputs on/off for fixtures, robots or peripherals.

Which machines use M51-M56/M61-M66?

M51-M56/M61-M66 is used in: Milling, Turning, Mill-turn, Laser/cut.

What should you watch out for with M51-M56/M61-M66?

High risk: a mistake here can cause a crash, a broken tool or an out-of-tolerance part. Simulate the program and dry-run it before cutting.

Related tools