[Kevin Sevcik]

Originally Posted by 1629GaCo

Check these out.

http://www.celesco.com/
http://www.celesco.com/stringpots/


We use them for our angles on our shooter mech and they work great. They are rather expensive, but they are worth it.

We used the same for a telescoping arm in 2011. Expensive, but worth it if you don't have other options. Here's another manufacturer:
http://www.micro-epsilon.com/displac...sor/index.html