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Equipment Comparison

Offline AOI vs Online AOI – A Practical Comparison for SMT Lines

Content

Choosing between offline AOI and online AOI impacts not only inspection quality, but also PCB flow, line stability, and automation complexity.

This comparison focuses on real production scenarios.


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Content

Choosing between offline AOI and online AOI impacts not only inspection quality, but also PCB flow, line stability, and automation complexity.

This comparison focuses on real production scenarios.

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Comparison Table

CriteriaOnline AOIOffline AOI
Installation PositionInline with SMT lineSeparate from main line
Impact on Line FlowDirect, may cause blockingIsolated from main flow
Changeover FlexibilityLimitedHigh
Suitable Production TypeHigh-volume, stableHigh-mix, flexible
NG HandlingImmediate but inlineFlexible routing
Space RequirementLowerHigher
System IntegrationSimplerRequires planning

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Key Observations

  • Online AOI offers faster feedback but increases line dependency

  • Offline AOI reduces line blocking in complex production

  • Inspection should be planned together with PCB routing

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Which One Should You Choose?

There is no universal answer. The decision depends on:

  • Product mix

  • Space availability

  • Inspection strategy

  • Automation level

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When Comparison Is Not Enough

If inspection choice affects overall line design, it should be treated as a system decision.

👉 Please refer to our Offline SMT Solutions for a structured inspection flow design.

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This issue is part of a broader PCB transfer and line stability topic.
Please refer to our
 
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