What must count as an acceptable adhesive bead on your part? Define the required path and continuity, then compare complete, incomplete and marginal examples under the presentation and lighting available on your line.
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Start with a drawing of the required bead path and examples of acceptable beads, gaps, excess adhesive and displaced material. Agree which of these conditions the camera must distinguish, including corners and changes in background. Trial the actual part presentation and record marginal cases as well as obvious defects.
A bead can be continuous yet misplaced, or correctly positioned but incomplete. Separate these decisions before selecting cameras so an attractive image is not mistaken for a complete inspection.
Mark the start, finish, corners and permitted joins on a part drawing. Decide whether a small break is always unacceptable or whether the product specification allows particular interruptions. Challenge examples should include thin stretches and short gaps at corners, not only a missing bead. The inspection must follow the intended path even when the part arrives slightly displaced.
Define the bead boundary relative to a repeatable part feature. Width and offset are different measurements: a wide bead can cover the nominal path while spreading into a prohibited area. Include excess material, tails and double dispensing in the sample set. State which dimensions are visible from the proposed camera view and which need another measurement method.
Trial the adhesive at the stage when inspection will occur. Fresh material, cured material and the same bead on a different substrate may produce different contrast. Include normal changes in surface finish, colour and ambient light. A successful lighting arrangement should distinguish the bead from reflections and background features without relying on a single ideal part.
Locate the check while the full required path remains visible. A top view after dispensing may lose access when the mating part is fitted. Decide whether the line should hold the part until an accepted result is available. Where bead height or deposited volume matters, do not infer those properties from a two-dimensional width image alone.
Associate the selected inspection path with the actual part variant and dispensing programme. Challenge a wrong recipe, an absent trigger and a part that moves during capture. Define the response to an uncertain or missing result as well as a clear defect. The assembly process needs a confirmed decision for the correct physical part.
Keep identified examples for a correct bead, interrupted bead, offset bead, excess material and the closest acceptable boundary. Run them with the normal positioning variation, then compare repeated results. Record the viewing conditions and agreed exclusions. A visible bead assessment does not establish bond strength, cure state or adhesion; those properties require their own product checks.
Use the specification checklist to record these decisions, then send your application details for review.
The right choice changes with visible defect or measurement definition for adhesive bead path & continuity, good, bad and marginal sample range, your line layout and required results.
You can review decisions about recipe, reject and line-control interfaces and false-accept, false-reject and challenge criteria at each stage.
Share representative good, bad and marginal samples, including the normal range for visible defect or measurement definition for adhesive bead path & continuity and the difficult good, bad and marginal sample range cases.
Compare suitable methods and use focused trials to show how each option performs against part presentation and production speed.
Connect the equipment to your line, services and controls while resolving optics, lighting and environmental conditions for day-to-day operation.
Confirm recipe, reject and line-control interfaces, then complete and record false-accept, false-reject and challenge criteria before your operating team takes over.
Your final solution for adhesive bead path and continuity must reflect the law, current standards and site-specific risks that apply to your installation.