G66/G67: Modal macro and cancellation

Activates a modal macro call that runs in subsequent blocks until cancelled.

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: Macros
Machine: Milling, Turning, Mill-turn
Risk: High
Example: G66 P9010 A5. / G67

G66/G67

Macros

Modal macro and cancellation

E.g.:

G66 P9010 A5. / G67

Parameters

P: Macro que se ejecuta después de cada bloque de movimiento mientras G66 esté activa.
L: Repeticiones.
A … Z: Argumentos, con la misma tabla de variables que G65.

Machine: Milling, Turning, Mill-turnRisk: High

Fanuc

G66 P... argumentos / G67

High risk if G67 is forgotten: the macro may continue to run.

Haas

Requires macros enabled; check compatibility per model.

Other codes in Macros

G65 Macro call Fanuc macros Fanuc variables and macro logic G66.1 Modal macro B call

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G66/G67 mean in a CNC program?

Activates a modal macro call that runs in subsequent blocks until cancelled. In the catalogue it appears as "Modal macro and cancellation", within the Macros family.

How is G66/G67 written on each control?

Fanuc: G66 P... argumentos / G67. The exact syntax depends on the control version and the machine parameters: always confirm with the manufacturer's manual.

Can you give me an example of G66/G67?

G66 P9010 A5. / G67 — Activates a modal macro call that runs in subsequent blocks until cancelled.

Which machines use G66/G67?

G66/G67 is used in: Milling, Turning, Mill-turn.

What should you watch out for with G66/G67?

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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