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G31: Skip / probing

Movement that stops or registers position when receiving a skip signal, used in probing and measurement.

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
Probing
Machine
Milling, Turning, Mill-turn
Risk
High
Example
G31 Z-50 F100
E.g.:
G31 Z-50 F100

Parameters

X Y Z
Destino del movimiento de palpado; se detiene al recibir la señal de skip. · mm
F
Avance de corte. · mm/min con G94, mm/vuelta con G95 (en torno suele ser el modo por defecto)
P
Selección de la señal de skip (P1-P4) en controles con varias entradas.

Machine: Milling, Turning, Mill-turnRisk: High

Fanuc

G31 X... Y... Z... F...
  • Requires a configured skip input; review the probe macros.

Haas

G31 ...
  • Very sensitive to probes, calibration and ground speeds.

Other codes in Probing

M78/M79 Skip signal alarmsG38.2-G38.5 Advanced straight probing
See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G31 mean in a CNC program?

Movement that stops or registers position when receiving a skip signal, used in probing and measurement. In the catalogue it appears as "Skip / probing", within the Probing family.

How is G31 written on each control?

Fanuc: G31 X... Y... Z... F... · Haas: G31 .... 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 G31?

G31 Z-50 F100 — Movement that stops or registers position when receiving a skip signal, used in probing and measurement.

Which machines use G31?

G31 is used in: Milling, Turning, Mill-turn.

What should you watch out for with G31?

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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