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 →VELTRIQ
Library
A technical library for the geometry, documentation and review of modular inspection fixtures.
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.
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.
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