Spring(s)!

Spring is in the air!  The fruit trees are blooming in the back yard and the fresh breeze is coming in gently from the newly opened windows.  With all that going on it’s hard for an engineer to keep his mind off of spring… or springs, for that matter.  Flowers and fresh air are certainly nice,…

Exact Constraint to the Rescue!

A client recently requested a repeatable positioning device for a bio-medical system.  Normally, this is a ‘turn the crank’ design, where the biggest challenge is sorting through previously-used kinematic configurations and applying the most appropriate one.  This project was more interesting though.  First of all, the environment precluded the use of springs, pins, and metal…