"LumenPnP Pasting Tool Eliminates Need for Solder Stencils in Future?"
In a groundbreaking development, Stephen Hawes, a renowned figure in the electronics industry, has introduced the LumenPnP Pasting Utility – a system that automates solder paste application without the use of traditional stencils. This innovative approach combines machine vision, Gerber file processing, and a custom paste extruder to achieve precise solder paste deposition directly onto PCB pads.
The heart of this automation lies in the fiducial-based machine vision alignment system. Cameras detect fiducial markers on the PCB, allowing the dispenser to align itself accurately with each pad location. This process eliminates the need for manual stencil creation, making the entire process more streamlined and efficient.
The software pipeline converts PCB layout data into precise paste extrusion commands. This conversion is facilitated by a web-based slicer that generates G-code from Gerber files, driving the paste extrusion without the need for manual intervention. Operators can manually jog the camera to locate fiducials initially, and subsequent boards can self-calibrate using those fiducials.
Calibration parameters such as the Z-index of the dispenser, nozzle offset, dispense degrees, and dwell times are tuned during setup. These parameters ensure the precision and consistency of the paste application. The software runs entirely in a browser tab using WebAssembly, making the automation portable and easy to access.
While the precision isn't yet as high as that achievable with traditional solder stencils, Stephen Hawes reports good success with this approach, enabling rapid prototyping without the cost and hassle of stencil manufacturing. This method integrates solder paste application into an automated pick-and-place workflow using the LumenPnP platform, streamlining PCB assembly.
Stephen Hawes, in his demonstration, showcases the camera jogging feature for home fiducial targeting. He also uses a fiber laser to print PCBs and an oven to reflow his boards. The LumenPnP Pasting Utility performs the entire pasting job automatically, making it a valuable tool for electronics enthusiasts and professionals alike.
The LumenPnP Pasting Utility is available at https://paste.opulo.io/. Stephen Hawes boldly claims that solder stencils are no longer necessary, marking a significant shift in the electronics industry. This innovative approach, powered by machine vision and automation, promises to revolutionise PCB assembly, making it more efficient, cost-effective, and accessible.
The LumenPnP Pasting Utility's software pipeline processes PCB layout data for precise paste extrusion commands, leveraging a web-based slicer that generates G-code from Gerber files. This automation, running in a browser tab using WebAssembly, integrates data-and-cloud-computing technology and artificial-intelligence (AI) to streamline PCB assembly.
The elimination of traditional solder stencils in the LumenPnP Pasting Utility's approach allows for a more efficient and cost-effective PCB assembly process, a testament to the transformative effects of technology in the electronics industry.
