SUBIT Automatic Stencil Inspection Machine: Improve SMT printing yield

01 Industry pain points: how does stencil quality affect SMT production lines
In the SMT production process, the quality of the stencil as a mold for solder paste printing directly affects all subsequent processes.
Subtle stencil defects may lead to problems such as more tin, less tin, and continuous soldering on the printed circuit board, and if these defects are not discovered in time, they will continue to amplify in the subsequent process, eventually leading to product scrapping.
Samsung once counted a data that showed that 80% of printing defects came from stencil quality problems. This data reveals the key position of stencil inspection in the entire SMT process.
The new steel mesh may have problems such as fewer holes, more holes, no breakdown, hole size deviation, XY direction offset, burrs, etc. while the used steel mesh may have hidden dangers such as uncleaned, blocked holes, and foreign body residues after cleaning.
Traditional manual inspection methods rely on magnifying glasses and naked eye observation, which are inefficient and have a high missed detection rate, which cannot meet the demanding requirements of modern electronic manufacturing for quality consistency.
02 Solution: The core technology of SUBIT automatic stencil inspection machine
In the face of industry pain points, SUBIT automatic stencil inspection machine integrates a number of advanced technologies to provide customers with a comprehensive stencil quality management solution.
High-precision vision inspection system
The SUBIT stencil inspection machine is equipped with a 20 million pixel high-definition camera and a professional lens, combined with a special white LED light source system, which can clearly capture micron-level defects in the stencil.
The equipment detects the speed of 3 seconds/FOV (field of view) and has a position accuracy of up to 0.03mm, which can quickly and accurately identify common stencil defects such as hole blockages, foreign objects, and burrs.
Automatic tension detection function
The equipment integrates a high-precision tensiometer, which can perform five-point tension testing in the range of 0-50N, with an accuracy of ±1NNaN. This feature effectively evaluates the service life of the stencil and prevents print quality issues caused by insufficient tension.
Intelligent data management platform
The SUBIT inspection machine has a built-in stencil information management system, which supports barcode scanning to quickly query stencil cleaning data and history. Equipment inspection data can automatically generate reports and support MES system data docking to realize real-time traceability and analysis of production data.
03 Technical parameters: Detection performance to meet diverse production needs
SUBIT automatic stencil inspection machine combines industry needs and provides comprehensive technical configuration to meet the precision testing requirements of various electronic manufacturing enterprises.
Parameter category: Specific configuration performance indicators
Detection capacity: Detection items Hole blockage, foreign object, tension, burrs, etc
Detection speed: 3 seconds/FOV
Position accuracy: 0.03mm
Hardware configuration: Camera system 20 million pixel camera
Optical lens: 50mm professional lens
Lighting system: white LED light source
Scope of application: Stencil size supports mesh frames within 736*736*1500px
Measuring range: 600*600mm
System integration: control system PLC+industrial control computer
Operating system: Windows 10 x64 version
Data interface: Support MES system docking
04 Application value: Improve SMT printing yield from the source
SUBIT automatic stencil inspection machine plays multiple core values in electronic manufacturing quality control, bringing comprehensive quality improvement and cost optimization to enterprises.
Establish steel mesh control standards
By implementing systematic stencil testing, enterprises can establish scientific stencil control standards and improve the production management system. This process helps to harmonize quality requirements and reduce quality fluctuations caused by different standards.
Alternative to manual testing
Fully automated testing equipment can greatly reduce the dependence on professional inspectors, reduce labor costs, and improve the consistency and reliability of testing.
Solve printing problems at the source
By implementing stencil inspection at the front end of the production line, printing problems such as over-tin, under-tin, and continuous soldering can be solved from the source, and the pass-through rate of SPI (solder paste detector) can be improved.
Adapt to future development trends
With the popularity of 01005 and smaller components, high-precision stencil inspection has become a necessary investment for electronics manufacturing companies. SUBIT inspection machines ensure that companies can meet the production challenges of tomorrow's higher precision requirements.
05 Brand advantage: Why global customers choose SUBIT
Rich industry experience
SUBIT specializes in the field of stencil inspection, deeply understands the process needs and technical challenges of the SMT industry, and can provide customers with practical and effective solutions.
Cost-effective option
As a direct sales brand, SUBIT offers competitive prices, eliminating the middleman price difference, allowing customers to obtain high-end testing equipment with lower investment.
Comprehensive service support
SUBIT provides customers with a one-year warranty and free software upgrade service for the whole machine, and promises service support that responds within 8 hours. This after-sales policy greatly reduces the customer's later maintenance risk.
Intelligent functional design

The equipment supports offline programming and remote maintenance, reducing downtime on the production line. The software interface is user-friendly, and operators can use it proficiently with simple training.
For electronic manufacturing companies pursuing excellent quality, SUBIT automatic stencil inspection machine is an indispensable strategic investment to ensure production quality and enhance market competitiveness.
Welcome to visit SUBIT's official website for more product details or contact our professional team to provide you with customized solutions.