Solder Paste Printing & Barcode Scanning Station Solution

Industry Demand

PCB manufacturers need to associate and track solder paste printing quality pre-reflow placement quality and post-reflow soldering quality with PCBs at different production stations (solder paste printing AOI pre-reflow AOI and post-reflow AOI). The barcode reading must be highly efficient and accurate: enabling high-speed production without manual intervention featuring contactless identification that is stable ive and contamination-free.
Required barcode specifications:
Supported codes: QR code Data Matrix (DM)
Barcode size: Varies generally within 10mm×10mm
Reading field of view: Maximum 65mm×50mm
Dynamic decoding: Capable of scanning and decoding during movement (conveyor speed ≥50mm/s)
Working distance: 80–100mm

Customer Pain Points:

The rapid iteration of electronic products has driven enormous demand for PCBs. In pursuit of higher production volumes, many manufacturers have compromised on quality control, typically relying on batch-based management systems. When defects occur in individual boards, this approach necessitates recalling entire production batches for inspection - a practice that not only wastes enterprise manpower and material resources, but also inflicts significant damage to both manufacturers and end consumers.

To address this critical industry challenge, PCB traceability systems have emerged as an essential solution. These systems penetrate deep into the PCB manufacturing sector, establishing comprehensive safeguards throughout the product lifecycle - from internal quality control during production to external circulation tracking in the supply chain - thereby ensuring product safety at every level.

Project Challenges:
1.The PCB needs to be read while in motion. The previous barcode reader was not very stable, and sometimes the images captured were unclear with image streaking phenomena. After solder paste printing on the PCB, sometimes the QR codes become blurred, resulting in the previous barcode reader's recognition rate failing to reach 100%.
2.The challenges in achieving accurate and stable code reading during PCB board production include: the presence of blurry QR codes on the PCB that are difficult to discern with the naked eye; the high-speed nature of PCB production requiring rapid code reading; and the necessity to maintain 100% data accuracy.

Model Selection:
Utilizing a high-frame-rate camera for image capture, the system can achieve speeds of up to 1m/s, effectively resolving image stretching issues caused by high product velocity. The intelligent AI decoding algorithm perfectly addresses problems with blurry and low-resolution codes. Additionally, the deep learning algorithm is specifically trained on challenging code data, ensuring 100% accurate code reading.

The barcode reader is installed above the conveyor belt in front of the solder paste printing quality inspection AOI equipment. The conveyor belt transports the PCB to the "identification" position, where the barcode reader scans the QR code on each PCB and records the information into the system, associating the printing quality results of each PCB with its corresponding QR code. Recommended model: R-5350, quantity: one unit.

Advantages:
Wide field of view and high detection accuracy, meeting the industry's common application scenarios of multi-board and multi-product co-production. AI algorithms: Trained on industry-specific challenging code acquisition data, solving the problem of low read rates. Supports high-speed dynamic decoding, with speeds up to 1m/s.