Context

Sample scenario: A tight coaxiality stack-up needs a repeatable control plan. 5-axis alignment errors often come from process drift, not machine capability. The process control plan determines whether alignment holds at scale.

A 5-axis alignment plan still needs probing, datum validation, and coaxiality checks. The process control plan matters more than the machine label.

The Trap

The trap is assuming a single 5-axis setup guarantees alignment. Without probing, datum control, and verification, alignment can still drift across runs.

The Geppetto Take

We treat 5-axis as a controlled process, not a magic tool. We probe critical datums, lock tool length offsets, and validate coaxiality before release.

Evidence / Data

  • Single-setup machining reduces re-fixturing error, but only if datums are verified.
  • In-process probing catches drift before final inspection.

Control Actions

  • Define a unified datum scheme before CAM.
  • Use probing to verify datums after roughing.
  • Lock tool offsets and thermal compensation.
  • Scan critical bores before release.

Checklist

  • Datum scheme documented in setup sheet.
  • Probing cycle added to program.
  • Tool offsets locked post-roughing.
  • CMM check on first article.

What to Send

Send the datum map, coaxiality requirements, and any alignment-critical interfaces.

FAQ

Is 5-axis enough to guarantee alignment?

No. It reduces setups but does not replace process control.

When should we probe?

After roughing and before finishing critical datums.

Do we need full CMM on every part?

Not always; sampling can work once the process is stable.

CTA

Send a screenshot for a chaos-check.