Map Honeycomb Flatness at Nine Points Before a Production Run
Measure support height at a named 3 × 3 grid before a valuable panel run. Compare the range with your own qualified focus evidence; do not invent a universal flatness tolerance.
Name all nine support stations
Large panels amplify small support-height differences into focus and cut inconsistency.
Observation: center is 0.8 mm below the front-left datum while the other eight stations remain within a 0.2 mm band. Controlled test: clean, unload, and repeat the nine readings with the same tool; then measure the panel separately. Interpretation: a repeated center depression points to support sag, while variation only with the panel points to stock. Action: service support or reject/fixture the panel against a proven process range.
Read patterns instead of averaging
| Pattern | Likely investigation | Escalation |
|---|---|---|
| One isolated high point | Debris or local damage | Clean and remeasure |
| Center low | Support sag or loading | Inspect support capacity |
| One side slopes | Frame seating or datum error | Reseat and remap |
| Support flat, panel uneven | Material bow | Sort or fixture review |
Retain successive nine-point maps. A trend can reveal debris or support change before it becomes a visible batch defect. Record the measuring tool and datum so a later map remains comparable.
Escalate against a proven process range
- Clean the support and stabilize the machine frame.
- Choose one repeatable datum and calibrated measurement method.
- Record front-left through back-right without averaging.
- Place the actual panel and record relevant surface values separately.
- Release only when variation falls within a process range proven by samples.
Never average nine points into one comforting number. The useful artifact is a grid with maximum, minimum, range, and pattern. A sample 0.0/0.1/0.1, 0.1/-0.8/0.0, 0.0/0.1/0.0 mm grid has a 0.9 mm range and an isolated center symptom.
Keep maps to reveal support drift
Trend the same datum and tool over time. No universal tolerance is stated because focus evidence depends on the qualified process.
Consult the X1S Pro product page for the selected setup. When support variation damages a valuable panel, Rework or Recut a Large Panel? Use a Cost Decision Worksheet helps choose the next economic action.
Questions about focus and a low center
Can autofocus map all nine points?
Do not assume it. Verify exactly what the current hardware and workflow support.
Should I press a bowed sheet flat during operation?
Never by hand. Use an approved fixture or reject the sheet.
Why not publish a single millimeter limit?
Focus tolerance varies with process, optics, material and required quality; it must be demonstrated.
Keep the grid, range, and pattern together
Nine values without station names lose the symptom. Repeat the same datum over time so support change becomes visible before a batch fails.
