A40 · Reference edition 2026.11
Base plate coordinates — Review and interpretation
A coordinate grid is a location reference, not necessarily a dimensioning or tolerance system. Define its origin and orientation.
Scope and purpose
Review the record before drawing a conclusion. Look for missing context, ambiguous labels and claims that exceed the evidence. The purpose is to identify what can be understood from the record and what still requires a separate assessment.
Working notes
This reference collection concerns light, offline dimensional-inspection layouts. It brings locating concepts, component descriptions and revision records together without substituting for an engineered fixture design. The drawings are original explanatory diagrams. Reference IDs identify documents, not commercially tested products. Read the scope and limitations alongside each example, and keep the actual part drawing and inspection requirements available when reviewing a proposed layout.
Practical example
Use an origin marker, positive axes and a unique position label for every component stack.
| Reference record | Interpretation |
|---|---|
| A40 | Base plate coordinates |
| Scope and purpose | A coordinate grid is a location reference, not necessarily a dimensioning or tolerance system. Define its origin and orientation. |
| Limits and interpretation | A grid intersection alone does not specify a mounting thread or interface. |
Review checklist
Read the record without relying on memory; check every label; identify uncertainty; decide whether a specialist review is required; retain the original observation.