example

Thumbnail image for statistical tolerance analysis basics: Root Sum Square (RSS)

statistical tolerance analysis basics: Root Sum Square (RSS)

In my last post on worst-case tolerance analysis I concluded with the fact that the worst-case method, although extremely safe, is also extremely expensive. Allow me to elaborate, then offer a resolution in the form of statistical tolerance analysis. cost A worst-case tolerance analysis is great to make sure that your parts will always fit, but [...]

continue…
Thumbnail image for statistical tolerance analysis basics: worst-case tolerance analysis

statistical tolerance analysis basics: worst-case tolerance analysis

fair warning: if you’ve never heard the phrase “tolerance analysis”, you’ll likely never have to perform it and should just spend the next 5 minutes elsewhere. Otherwise… A well-performed tolerance analysis will add years to your life. No worrying about parts fitting together, no worries about sloppy fits.  A well-done tolerance analysis both proves the [...]

continue…
Thumbnail image for urethane castings: 3 things to ask before you hit ‘send’

urethane castings: 3 things to ask before you hit ‘send’

A while back I shared some things you should know about urethane castings. I focused mainly on when you should use them, and not so much on some of the actual design considerations. So here you go… design considerations. The overarching theme is that rapid prototyping houses like to do things a certain way. Sometimes though, [...]

continue…