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Tips for Managing Footprint Libraries in PCB Desig |
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getawaycar 
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Joined: 8 hours 47 minutes ago Status: Offline Points: 2 |
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 Topic: Tips for Managing Footprint Libraries in PCB DesigPosted: 8 hours 40 minutes ago at 2:27am |
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Hi all, I’m currently working on improving my PCB design workflow, and I’ve noticed that managing footprint libraries can be quite time-consuming, especially when dealing with multiple component suppliers and custom parts. I’d love to hear how other designers handle this. Do you rely mostly on manufacturer-provided footprints, build your own from scratch, or use third-party libraries? Looking forward to your insights and best practices! Thanks in advance!
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5804 |
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Posted: 2 hours 59 minutes ago at 8:08am |
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Static CAD libraries available on in the market are problematic because you need to deal with whatever someone created. Different people use different rules and guidelines. One of the most frustrating and simple things is measurement units - Inch or Metric.
Then there are all the Drafting Outlines. Even when you use Mfr. Recommended Patterns. Read this: Then there is an IPC-7351 3-Tier library system, but static libraries never offer that option. We recommended using 'Calculators' to autogenerate solder patterns directly from package dimensions and user defined Options for every aspect of a PCB library footprint. In a footprint Calculator, the package dimensions can be used to autogenerate a high quality 3D STEP model. The Calculators display the component body and terminal lead outlines, so when you use the mfr. recommended pattern, you can actually see the solder joint goals real time. Every non-standard semiconductor package and connector must use the mfr. recommended pattern because it's impossible to calculate a non-standard pad stack and footprint. There is only 1-Tier for non-standard packages. The quality control for manually building non-standard mfr. recommended patterns is to import the 3D STEP model provided by the component manufacturer to ensure all the terminal lead accuracy on the pad stacks. Organizing your library data in an editor that saves the package dimensions, Footprint Name, Physical Description, Case Code, Manufacturer, Part Number, Logical Description, Mounting Type, Datasheet link, Part Status and Comments is very important for long term library organization. You need a quick way to find all the parts you built over the years and eliminate duplication of effort. A neutral database is important on many levels. You can change your master option file and generate an entirely new library with one click. You can also change CAD tools and rebuild your library with one click. You can also sort through many different component manufacturers package dimensions and find common package dimensions with similar tolerances to streamline the creation of your discrete component library of Chip packages. Try Footprint Expert for a 30-day free trial and a webcast training and you'll see the future of electronic product development automation. |
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