Before you make an SMT line investment, it is mandatory that you understand how the SPI machine working process happens.
To maintain quality and consistency, let's take a closer look at this.
For technicians working with SMT machines, knowing the operational fluency of the line helps maintain precision and efficiency. Among all the equipment, SPI machines stand out as indispensable in maintaining quality and delivering high yields.
In this blog, we will explain the SPI machine working process so that you are informed enough to streamline your production line, reduce rework, and ensure higher yield rates.
Keep reading to know more!
Understanding the SPI Machine Working Process
What is a Solder Paste Inspection Machine?
A solder paste inspection machine is a specialised SMT equipment that ensures the application of solder paste on Printed Circuit Boards (PCBs).
It utilises advanced optical and 3D imaging technologies to scan the PCB after the application of solder paste. It measures parameters such as height, volume, and area of the paste deposits, quickly detecting deviations from preset specifications.
An SPI machine acts as a quality-control checkpoint in the SMT assembly process, ensuring that each PCB receives precise solder paste deposits for reliable performance.
SPI Machine Working Process
Here, we list the SPI machine working process so you can better understand the process.
Step 1: The PCB is Loaded
The process begins with the PCB entering the SPI machine, usually right after solder paste has been applied by a stencil printer.
The board is automatically aligned within the machine, allowing for high-precision inspection.
Step 2: Solder Paste is 3D Scanned
Unlike simple 2D cameras, SPI machines use 3D optical scanning systems to measure solder paste deposits.
Structured light or laser technology projects onto the paste, and cameras capture images from multiple angles. This creates a 3D profile of every solder pad on the board.
Step 3: Pre-Set Measurement and Analysis
The machine's software compares the 3D data against predefined standards. It measures critical parameters such as:
- Height of the solder paste deposit
- Volume of paste applied
- Shape and alignment of each deposit
If the paste is too thin, excessive, or misaligned, it can cause defects such as shorts, opens, or weak solder joints later in the assembly process.
Step 4: Any Defects are Detected
The SPI system automatically flags any deposits that fall outside the set tolerance. These defects are highlighted on-screen for operators to review.
Depending on the setup, the machine can stop the line for corrections or pass data to connected systems for real-time process adjustments.
Step 5: Instant Feedback
One of the biggest strengths of SPI machines is their ability to provide instant feedback. If a stencil printer is consistently applying too little or too much solder, the SPI machine detects the pattern and alerts operators.
This allows for adjustments to the process before more boards are affected, saving both time and materials.
Step 6: Post-Inspection Production
After inspection, boards that meet the required standards move forward to the pick-and-place stage where components are added. Boards with errors are either corrected or rejected, depending on the severity of the defect.
This ensures only high-quality assemblies continue through production.
Conclusion
If you are seeking to enhance the standard of your SMT line production, then understanding how the SPI machine working process happens is a must.
By leveraging this technology correctly, you can reduce errors, minimise rework, and achieve greater efficiency in the production line. Embracing SPI technology today translates to more reliable products and a stronger competitive edge tomorrow.
Achieve high production yields with HJE Tech India Pvt. LTD.
Why Choose HJE Tech for SMT and SPI Solutions?
Trust HJE Tech India Pvt. Ltd. for cutting-edge SPI machines that streamline your SMT process and boost productivity. We deliver advanced machines that provide quality and efficiency.
Enhance SMT efficiency with HJE Tech India PVT. LTD. Get in touch today!
Disclaimer: The information provided in this content is just for educational purposes and is written by a professional writer. Consult us to know more about SMT machines.
