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G61/G64: Exact stop and continuous mode

Controls whether the machine prioritizes stopping exactly in blocks or maintaining a smooth continuous trajectory.

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
Toolpath
Machine
Milling, Turning, Mill-turn
Risk
Medium
Example
G61 / G64
E.g.:
G61 / G64

Machine: Milling, Turning, Mill-turnRisk: Medium

Fanuc · Haas

G61 / G64
  • Fanuc: G61 improves corner precision; G64 can improve cycle time and smoothness.
  • Haas: On Haas it can be conceptually combined with smoothing settings such as G187.

Siemens

  • Equivalences by CYCLE832, COMPCAD or dynamics adjustments according to control.

Other codes in Toolpath

G08/G09 Smoothing and block-wise exact stop
See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does G61/G64 mean in a CNC program?

Controls whether the machine prioritizes stopping exactly in blocks or maintaining a smooth continuous trajectory. In the catalogue it appears as "Exact stop and continuous mode", within the Toolpath family.

How is G61/G64 written on each control?

Fanuc: G61 / G64 · Haas: G61 / G64. 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 G61/G64?

G61 / G64 — Controls whether the machine prioritizes stopping exactly in blocks or maintaining a smooth continuous trajectory.

Which machines use G61/G64?

G61/G64 is used in: Milling, Turning, Mill-turn.

What should you watch out for with G61/G64?

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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