SMT AOI/SPI/X-ray

Why Inline SPI Matters for SMT Lines

Solder paste inspection is one of the most critical checkpoints in SMT quality assurance. Errors in paste volume, alignment, or distribution directly contribute to:

• Reduced solder joint reliability

• Higher reflow defects

• Increased rework rates

Accurate, inline inspection allows immediate corrective actions on solder printing parameters, improving first-pass yield and long-term process stability.

----------------------------------------------------------------------------------------------------------------------------

Core Capabilities of Inline 3D SPI V870

While specific performance varies by configuration, inline 3D SPI systems like V870 typically include:

• High-speed optical measurement platform—ensures stable, real-time inspection

• Servo-driven motion system—provides smooth PCB transport within the line

• High-resolution imaging and 3D reconstruction—detects quantity, height, area, and volume abnormalities

• Integrated SPC and statistical reporting—supports quality trend analysis and feedback

• SMEMA Interface compatibility—for seamless machine-to-machine communication within automated lines

👉 Accurate solder paste inspection is essential for both quality and yield optimization.

--------------------------------------------------------------------------------------------------------------------------------

Typical Production Scenarios

The Inline 3D SPI V870 is most effective when your SMT line requires:

• High throughput with inline inspection

• Real-time solder paste quality control before placement

• Consistent production quality in mixed or high-volume production

• Tight integration with upstream and downstream machines

In these environments, inline inspection strengthens quality control without slowing production flow.

-------------------------------------------------------------------------------------------------------------------------------

Inline vs Offline SPI — Choosing the Right Strategy

Inline SPI excels when your line operation is:

✔ Highly automated
✔ Space and layout support inline integration
✔ Required to react quickly to printing quality deviation
✔ Structured for immediate data feedback

In contrast, offline SPI may be preferred when:

✔ Production is high-mix, low-volume
✔ Line flexibility matters more than real-time feedback
✔ Space or conveyor logic does not allow inline inspection

👉 Refer to our Inline vs Offline SPI Buyer’s Guide for detailed decision logic.

---------------------------------------------------------------------------------------------------------------------------------

Integration and Line Stability Considerations

Inline SPI integration must be coordinated with:

• Conveyor timing and machine footprints

• SMEMA signal synchronization

• Inspection routing and NG board handling

• Factory production planning and conveyors/buffering

To avoid unintended line blocking or transfer delays, inline SPI should be part of a system-level line layout design.
👉 See our SMT Line Layout Design Solutions for full line integration planning.