Expected decision
Label each sample with the agreed accept, reject or review decision and the reason. Define borderline cases with the quality team rather than changing the limit after observing the result.
Industrial machine vision
Adhesive bead inspection challenge-test checklist
Plan adhesive bead inspection challenge tests for gaps, offset, excess material, marginal samples, recipe changes and missing or uncertain results.
In brief
Agree expected decisions before testing adhesive bead inspection. Use accepted, clearly rejected and marginal samples to challenge continuity, width and path position separately; retain the observations and the actual line response.
Challenge missing images, wrong recipes and uncertain results as well as visible defects. The examples below are proposed test cases, not reported performance results.
On the production floor
Challenge the decision and the handling response
A rejected sample is useful only if the result belongs to the right physical part and the agreed response occurs. Record the sample, part variant, recipe, production condition, decision and any unresolved case.
Discuss your application
What to record
Record the criteria, conditions and evidence
Production conditions
Include normal appearance variation, marginal beads, realistic presentation and intended timing. Repeat relevant challenges after recipe changes and recovery from a stop.
Evidence and response
Keep the result record and confirm the required hold or reject response. Agree repetitions, acceptable outcomes, responsibilities and unresolved actions before acceptance.
Before you contact us
Five questions before an inspection trial
- Who sets the expected result?Identify the quality or production owner who can approve each sample judgement and acceptance criterion.
- Which boundaries need a challenge?Include continuity, width, position and excess material only where they are part of the agreed inspection duty.
- Which production conditions matter?Record part variant, appearance, presentation, lighting and timing for each challenge.
- What happens without a reliable result?Agree the response to a missing image, wrong recipe or uncertain decision and how that response is demonstrated.
- What evidence closes acceptance?Agree repetitions, records, expected responses and responsibility for unresolved cases before testing.
Connected details
Six details to include in your brief
Intentional gap
Include a break on the required bead path, including a difficult corner or join. Record whether the complete required path is assessed.
Incorrect width or position
Challenge an agreed narrow/wide example and an offset example separately. Passing a width check must not automatically count as passing the path-position check.
Excess adhesive
Include the visible tails, extra material or double-dispense condition relevant to the part. Agree where this material matters and how it is judged.
Marginal good and bad samples
Include examples near the agreed decision boundary and normal appearance variation. Retain uncertain cases for review instead of silently relabelling them.
Recipe and missing-result faults
Check the agreed response to an incorrect recipe, missed trigger or unusable image. Confirm which part each result belongs to.
Reject and controlled recovery
Check the physical hold/reject response and recovery under the agreed line conditions. Document the result, exceptions and actions needed before handover.