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G39: Corner interpolation with offset

Function associated with corner rounding/interpolation during radius compensation in some controls.

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
Compensation
Machine
Milling, Turning, Mill-turn
Risk
Medium
Example
G39 X... Y...
E.g.:
G39 X... Y...

Machine: Milling, Turning, Mill-turnRisk: Medium

Fanuc · ISO común

  • Fanuc: It can be used with tool compensation; check the G41/G42 approach and retract.
  • ISO común: Not universal; depends on the control.

Other codes in Compensation

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G39 mean in a CNC program?

Function associated with corner rounding/interpolation during radius compensation in some controls. In the catalogue it appears as "Corner interpolation with offset", within the Compensation family.

Can you give me an example of G39?

G39 X... Y... — Function associated with corner rounding/interpolation during radius compensation in some controls.

Which machines use G39?

G39 is used in: Milling, Turning, Mill-turn.

What should you watch out for with G39?

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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