Tag Archives: China

Bunnie’s Factory Tour Part 1: How To Make A BOM

Bunnie Huang posted an extensive explanation of how you’re doing your Bill Of Materials (BOM) all wrong. Here’s a taste. For the whole 5-course meal head over to his blog.

Most Makers trying to scale up quickly realize the only practical path forward is to outsource production.

Every single assumption, down to the color of the soldermask, has to be spelled out unambiguously for a third party to faithfully reproduce a design. Missing or incomplete documentation is the lead cause of production delays, defects, and cost overruns.

Here’s some of the things missing from the [typical] BOM:

  • Approved manufacturer for each component
  • Tolerance, material composition, and voltage spec for passive components
  • Package type information for all parts
  • Extended part numbers specific to each manufacturer

A complete BOM for an LED flasher also needs to include the PCB, battery, plastic case pieces, lens, screws, any labeling (for example, a serial number), a manual, and packaging (plastic bag plus cardboard box, for example). There may also need to be a master carton as a single boxed LED flasher is too small to ship on its own.

 

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Makerbot Gets Cloned…Again

Well that escalated quickly.

Open source hardware hasn’t really been a thing for very long, so it doesn’t have many success stories. Arduino is probably the only obvious one. Makerbot is quickly becoming the second. How can you tell when an idea is successful? Easy, it gets copied.

Matt Strong figured out how to source the parts for a Makerbot Replicator from China and joined Kickstarter with a proposal: if he could gather $500,000 he would offer his TangiBot (a clone of the Replicator) for 30% less. How that turned out and what it means…after the jump.

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