End of line automation refers to the systems and processes used to handle, label, inspect, reject and pack products at the final stage of a production line.
While this section is often overlooked, it is where many production issues originate. Poor product flow at the end of the line can undo efficiency gained earlier in the process, leading to downtime, quality failures and operator intervention.
What is included in end of line automation?
End of line typically includes:
- product discharge from upstream equipment
- conveyors and spacing control
- checkweighing
- print and apply or coding
- vision inspection and verification
- reject or divert systems
- final pack off
Each element depends on stable flow from the one before it.
Where do end of line bottlenecks usually occur?
Bottlenecks commonly appear:
- before print and apply systems
- at conveyor transfer points
- before inspection systems
- around reject mechanisms
These issues are rarely caused by a single machine. They are usually caused by inconsistent flow.
How does product flow affect labelling and inspection accuracy?
Print and vision systems rely on predictable timing and stable presentation. Variations in spacing, vibration or orientation increase the risk of missed labels, unreadable codes and false rejects.
Improving flow often improves accuracy without changing hardware.
Why conveyors play a control role, not just transport
Conveyors regulate speed, spacing and stability. When designed as part of the system, they enable reliable end of line performance. When treated as simple transport, they become a source of instability.
Key takeaways
- Most end of line issues are caused by flow, not equipment faults
- Stable handling improves accuracy and throughput
- Conveyors are central to end of line control
