Designing for Selective Robotic Conformal Coating Processing: Rule 4 “Avoiding component Collisions”

As stated before robot systems are generally not intelligent unless you pay for very sophisticated software based systems with clever sensing systems. When a robot head drives a spray valve around it does not consider the variation in the component placement. It will continue “through” the component if it is in the way and probably destroy the PCB at the same time.

Rule 4

Understand that through-hole components have a very wide range of placement orientations, and if used on a PCB, the drawing must cover all possible orientations of the devices, plus 2.5mm optional coating area. This is to ensure you coat the component leads, wherever they may be positioned.

The Rules

The Rules for Selective Conformal Coating are straightforward. Follow them and you can save money and time in your application process. However, if the Rules are not followed, the resultant circuit board design can challenge even the most sophisticated conformal coating system and its operator to achieve the finish desired.

Click Designing Circuit Boards for Selective Robotic Conformal Coating for further Rules.

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About Dr Lee Hitchens

Dr Hitchens has been working in the electronics industry and the area of conformal coatings for over 25 years in various areas including sales and technical support. He has also been training people for almost the same amount of time in all areas of conformal coating whether that is materials & equipment selection, process development or troubleshooting to help them solve their particular problem. Recently, he decided that the industry needed a specific place where all of the useful knowledge on conformal coatings could be collated for users to find easily and use in their own production process. So, Nexus was born and he began the Nexus eBook project.

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