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M70/M71: Mirror / cancel mirror (some Fanuc)

On some Fanuc and compatible controls: M70 turns mirror mode on, M71 cancels it. Functionally equivalent to G50.1/G51.1.

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
Transformations
Machine
Milling, Mill-turn
Risk
High
Example
M70 X / M71
E.g.:
M70 X / M71

Machine: Milling, Mill-turnRisk: High

Fanuc · ISO común

  • Fanuc: Not universal; It depends on PLC and manufacturer parameters. Check before use.
  • ISO común: ISO standard uses G50.1/G51.1.

Other codes in Transformations

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does M70/M71 mean in a CNC program?

On some Fanuc and compatible controls: M70 turns mirror mode on, M71 cancels it. Functionally equivalent to G50.1/G51.1. In the catalogue it appears as "Mirror / cancel mirror (some Fanuc)", within the Transformations family.

Can you give me an example of M70/M71?

M70 X / M71 — On some Fanuc and compatible controls: M70 turns mirror mode on, M71 cancels it. Functionally equivalent to G50.1/G51.1.

Which machines use M70/M71?

M70/M71 is used in: Milling, Mill-turn.

What should you watch out for with M70/M71?

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.

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