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M68/M69: Hydraulics / auxiliary output

It can control hydraulic plate, auxiliary output or relay depending on the machine.

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
Auxiliary
Machine
Turning, Mill-turn
Risk
High
Example
M68 / M69
E.g.:
M68 / M69

Machine: Turning, Mill-turnRisk: High

Fanuc · Haas

  • Fanuc: Common in chuck clamp/unclamp or hydraulic lathe, but not universal.
  • Haas: It can also be relay/output depending on the model and option.

Other codes in Auxiliary

See the full list of G and M codes

Frequently Asked Questions (FAQ)

What does M68/M69 mean in a CNC program?

It can control hydraulic plate, auxiliary output or relay depending on the machine. In the catalogue it appears as "Hydraulics / auxiliary output", within the Auxiliary family.

Can you give me an example of M68/M69?

M68 / M69 — It can control hydraulic plate, auxiliary output or relay depending on the machine.

Which machines use M68/M69?

M68/M69 is used in: Turning, Mill-turn.

What should you watch out for with M68/M69?

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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