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Solder Paste Inspection Machine

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Your Professional Solder Paste Inspection Machine Supplier

 

 

NeoDen Tech is a global leader in manufacturing comprehensive SMT equipment. Operating from our 27,000+ m² NeoDen Park, we have evolved beyond standalone machines to become a provider of full-scale turnkey assembly lines.Our extensive product portfolio covers every critical stage of the PCBA production process. Products distributed to 130+ countries, serving applications from research laboratories to SME production lines..

 

 
 
Why Choose Us
 

Advanced Equipment
NeoDen offers a full range of SMT equipment covering the entire PCB assembly process, including high-speed pick-and-place machines, reflow ovens, stencil printers, as well as automated inspection and rework systems.

 

Professional Team
Backed by three specialized R&D departments and a team of 25 engineers, NeoDen holds independent intellectual property rights for its core technologies. We continuously innovate to ensure the precision and production stability of our equipment, empowering buyers with reliable, long-term automated manufacturing capabilities.

 

Quality Control
NeoDen strictly adheres to ISO standards, subjecting every piece of equipment—from individual components to the complete machine—to comprehensive testing. Ensuring smooth production line operations and consistent product quality control.

 

24H Online Service
Our offering services such as sample testing, online training, remote troubleshooting, and on-site support. Buyers are guaranteed a response within 8 hours and a resolution within 24 hours, thereby minimizing production risks.

 

 

Overview of Solder Paste Inspection Machine

A Solder Paste Inspection (SPI) machine is an automated optical system in SMT manufacturing that inspects solder paste deposits on PCBs immediately after printing and before component placement. It uses 3D laser or structured light to measure volume, height, area, and registration to detect defects like missing paste, bridging, or misalignment, preventing75% of assembly errors.

SPI Machine

 

Product Specification
 

We offers the following product specifications：

Check System

Camera: 5 mega-pixel

Lighting: Surrounded RGB

FOV: 42 × 34mm (17 μm)

Processing time per frame: < 0.7 seconds

Max test height: 450 μm

Solder scope: 0.2 ×0.2 mm ～ 12 × 12 mm

Performance Metrics

Height detection precision: 1 μm

Volume/Area/Height Repeatability: < 1 μm @3sigma

Repeatability & Reproducibility (R&R): < 10%

Software Features

Operating System: Windows 10 64-bit

Operating Interface: Graphical programming, Chinese/English language switching

Programming Support: Supports Gerber, CAD input, offline and manual programming

SPC Support: Offline SPC / Real-time reporting (Anytime Report)

Data Export: Excel, Images (jpg, bmp)

Mechanical & Transfer

PCB Transfer Height: 900 ± 30 mm

Substrate Fixing Mode: Edge Lock Plate

Min PCB Size: 50 × 50 mm

Max PCB Size: 500 × 460 mm

Transfer Speed: 1500 mm/s (Max)

Platform System

Driver Equipment: AC servo motor system

X/Y Platform Setting Accuracy: 5μm

Moving Speed: 600 mm/s

 

SPI Machine

 

Product features

3D solder paste inspection based on white-lightsine stripe PMP technology;
Solder paste height inspection accuracy reaches 1 um;
Auto-restore pad 3D data on PCB surface, calculate thevolume, area, height and deviation of every solder
Multi-direction,multi-angle 3D PMP inspection;
Vivid and easy to used graphic interaction interface, comprehensive function and easy to handle;
In addition to programming with Gerber file, image-oriented edit mode can also realize off-lineprogramming and debugging;
Multi-touch function can realize 3D image rotationand 2D image resizing, convenient to check and confirm solder paste condition;
Comprehensives SPC function includes manykind of diagrams generation and output;
Image accelerate calculations base on multi-GPU;
Integrated cast iron frame structure, highrigidity can avoid outside vibration

 

Components

 
 

Camera Systems: SPI equipment is equipped with advanced camera systems that capture high-resolution images of the PCB surface after solder paste application. These cameras play a pivotal role in creating detailed images of the solder paste deposits, enabling precise analysis and comparison with the intended design.

 
 

Illumination Sources: Proper lighting is essential for accurate imaging. Illumination sources in SPI equipment ensure that the PCB surface is adequately lit, enhancing the visibility of solder paste deposits. Varied lighting conditions allow for comprehensive inspections, ensuring that the system can adapt to different manufacturing environments.

 
 

3D Measurement Technology: Many modern SPI systems utilize 3D measurement technology to assess the height and volume of solder paste deposits. This technology enables a more comprehensive evaluation, going beyond 2D inspection. By measuring the height of the solder paste, SPI systems can identify variations and inconsistencies that might be overlooked in a purely 2D inspection.

 
 

Automated Inspection Software: The heart of an SPI system lies in its software algorithms. Automated inspection software processes the captured images, comparing them to the pre-defined standards and specifications. This software is designed to identify deviations in solder paste deposition, allowing for quick and accurate detection of defects or misalignments.

 

 

Application

 

Solder paste inspection (SPI) is a critical process in the electronics manufacturing industry, ensuring the quality and reliability of printed circuit boards (PCBs) before they proceed to the soldering stage. With the increasing complexity of electronic assemblies, manufacturers rely on SPI machines to maintain precision and consistency in the application of solder paste.

  • Consumer electronics
  • Automotive electronics
  • Medical equipment
  • Industrial control

 

 

Other Services

All of our machines will be fully checked by our quality control department before the shipment. We guarantee all of our machines have a one-year warranty (quick-wear parts not included).
Training details: Operation principles, system, and structure, safety and maintenance, software processing technique, etc.


Numerous feedback from our clients have proven that our machines are stable in performance with rare malfunction. However, we would like to handle it as follows once malfunction occurs:

  • We guarantee that we will give you a clear reply within 24 hours.
  • Customer service staff will assist you in analyzing the malfunction to locate the cause.
  • If the malfunction is caused by improper operation of software and other soft faults, we will help solve the problem online.
  • We will offer plenty of online support, like detailed technical and installation instructions via email, video, and telephone.
SPI Machine

 

Package & Delivery

 

Package: Standard export package or Custom
Delivery: By air express, by sea

 

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FAQ

 

Q: What is the primary function of a Solder Paste Inspection (SPI) machine?

A: An SPI machine is designed to inspect solder paste deposits on PCBs after the printing process, ensuring proper volume, height, area, and alignment before component placement.

Q: Why is SPI critical in SMT production lines?

A: SPI helps detect printing defects early—such as insufficient or excessive solder paste, bridging, or misalignment—reducing rework, improving yield, and preventing downstream failures.

Q: What inspection technology does the system use?

A: Most modern SPI systems utilize 3D optical measurement technology, typically based on structured light or laser triangulation, to achieve highly accurate volumetric analysis.

Q: What level of measurement accuracy can be expected?

A: High-end SPI machines offer measurement repeatability within ±1% and height resolution down to a few microns, ensuring reliable and consistent inspection results.

Q: Can the SPI system handle fine-pitch and miniaturized components?

A: Yes, the system is optimized for fine-pitch applications, including 01005 components and micro-BGA pads, with high-resolution cameras and advanced algorithms.

Q: How does the machine manage false calls and detection stability?

A: Advanced software algorithms, combined with adaptive thresholding and self-learning capabilities, significantly reduce false rejects while maintaining high defect detection rates.

Q: Is the SPI machine compatible with Industry 4.0 environments?

A: Yes, it supports full data connectivity, including MES/ERP integration, real-time monitoring, SPC (Statistical Process Control), and closed-loop feedback to printers.

Q: What is closed-loop feedback in SPI systems?

A: Closed-loop feedback allows the SPI machine to automatically send correction data back to the solder paste printer, optimizing print parameters and improving process consistency.

Q: What types of defects can the system detect?

A: It can detect insufficient/excessive solder, bridging, offset, smearing, missing deposits, and shape abnormalities, among others.

Q: How user-friendly is the programming and operation?

A: The system features an intuitive graphical interface, auto-programming capabilities, and CAD/Gerber data import, significantly reducing setup time and operator dependency.

Q: What is the typical inspection speed?

A: Inspection speed varies by model, but modern SPI machines are capable of high-speed scanning without compromising accuracy, supporting inline production requirements.

Q: Does the system support multi-board or dual-lane configurations?

A: Yes, many SPI systems offer dual-lane or multi-line configurations to increase throughput and optimize floor space utilization.

Q: What maintenance is required for the SPI machine?

A: Maintenance is minimal, typically involving periodic calibration, lens cleaning, and system diagnostics, with modular design for easy servicing.

Q: How does the system ensure traceability and quality control?

A: The SPI machine records detailed inspection data, images, and statistical reports, enabling full traceability and compliance with quality standards.

Q: What kind of support and training are available?

A: Suppliers typically provide comprehensive training, remote technical support, software updates, and global service coverage to ensure smooth operation and long-term reliability.

As one of the leading solder paste inspection machine manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to buy high-grade solder paste inspection machine at competitive price from our factory. Thank you for your interest in our products.

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