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G25/G26: Spindle speed fluctuation detection

G25 cancels spindle speed fluctuation detection; G26 activates it to detect interrupted cuts or imbalance.

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
Spindle
Machine
Milling, Turning, Mill-turn
Risk
Medium
Example
G26 S1500 D200 L0.5 / G25
E.g.:
G26 S1500 D200 L0.5 / G25

Parameters

S
rpm que se vigilan. · rpm
D
Desviación permitida antes de dar alarma. · rpm
L
Tiempo de espera antes de empezar a vigilar. · s

Machine: Milling, Turning, Mill-turnRisk: Medium

Fanuc · Haas

  • Fanuc: Useful for lathe and mill; the D and L parameters define band and time.
  • Haas: Haas does not implement G25/G26 as standard.

Other codes in Spindle

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G25/G26 mean in a CNC program?

G25 cancels spindle speed fluctuation detection; G26 activates it to detect interrupted cuts or imbalance. In the catalogue it appears as "Spindle speed fluctuation detection", within the Spindle family.

Can you give me an example of G25/G26?

G26 S1500 D200 L0.5 / G25 — G25 cancels spindle speed fluctuation detection; G26 activates it to detect interrupted cuts or imbalance.

Which machines use G25/G26?

G25/G26 is used in: Milling, Turning, Mill-turn.

What should you watch out for with G25/G26?

Medium risk: it rarely breaks anything on its own, but a wrong value shows up on the part. Check the block before running the batch.

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