July 24, 2018 – Nordson ASYMTEK announced an automated coating inspection (ACI) line combining its Select Coat SL-940 Conformal Coating system with the FX-940UV Series ACI/AOI Automated Conformal Coat Inspection system. Together, the systems ensure a conformal coating process.
Eliminating coating problems starts with a conformal coating system with process controls. The Nordson ASYMTEK Select Coat SL-940 conformal coating system has a range of features to monitor and control the process and to provide traceability, such as Fan Width Control, Viscosity Control, Flow Monitoring, a bar code system, and a vision system. Information can be exchanged with customer-specific Factory Information Systems (FIS) and Manufacturing Execution Systems (MES) to ensure factory production workflow.
Conformal coatings used by electronic manufacturers contain UV indicators for the purpose of inspection. Since coatings are transparent, parts must be viewed under ultraviolet or black light to verify coverage and non-coverage. The FX-940UV’s UV lighting and image-processing technology integrate several techniques, including coverage and color inspection, normalized correlation, and rule-based algorithms to provide complete inspection coverage. Multiple-camera imaging technology offers inspection with defect coverage. The FX-942 model provides dual-sided viewing (top-down and bottom-up) cameras. The ACI/AOI systems inspect conformal coating coverage and verify correct part assembly in SMT or through-hole applications.
A known-good board is used to teach the coverage and non-coverage areas. Automated inspection typically takes only a few seconds and results are immediately displayed. These results can be stored and reviewed off-line. The FX-940UV also reads all common barcodes and captures board images for product traceability.
Configurable for several line positions, the FX-940UV ACI series is effective for coating, pre- and post-cure, and final assembly inspection. Off-line programming maximizes machine utilization and real-time SPC monitoring provides a yield enhancement solution. The FX-940UV can be fully integrated with a FIS/MES system to capture up-to-the-minute process data. Single-page feedback reports provide an overall view of the inspected board and allow users to zoom in on specific areas of interest, such as around keep out zones and critical components.