Locators and supports
A locator establishes a reference; a support resists movement under a load. One component can perform both roles, but its role must be recorded.
Read more →Reference material / 2026
Precision begins with a clear reference.
A technical library for the geometry, documentation and review of modular inspection fixtures.
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Datum reference frames
The drawing datum scheme and the physical fixture are related descriptions, not interchangeable objects. Datum precedence affects the intended setup.
Read more →The 3-2-1 layout concept
Three, two and one contact groups describe a conceptual constraint arrangement for a suitable rigid part. Contact geometry still needs review.
Read more →Redundant constraints
Two contacts intended to locate the same direction can compete when the part or fixture varies. More contacts do not guarantee better repeatability.
Read more →Probe access
A nominally clear measured feature may be inaccessible along the probe approach or withdrawal path. Include the whole inspection movement.
Read more →Retention and loading order
Retention holds a part against established references. Applying retention before seating can create a different final orientation.
Read more →Contact pads
Pad shape, material and replaceability affect the interface description. Record where the part touches rather than relying on a catalogue image.
Read more →Base plate coordinates
A coordinate grid is a location reference, not necessarily a dimensioning or tolerance system. Define its origin and orientation.
Read more →Component stacks
A stack record needs an ordered sequence from the base to the part contact. Component IDs alone do not establish assembled height.
Read more →Layout changeovers
A repeatable changeover record identifies which items stay, which move and which are replaced. It also records the previous valid arrangement.
Read more →Visual review and storage
Visual observations help track wear and contamination but cannot replace dimensional or material evaluation. Separate observation from decision.
Read more →Revision and traceability
A useful revision explains what changed, why the record changed and which figures or component tables are affected.
Read more →All reference documents are available without an account.
Illustrative reference; not a tested product or a certification.