Linear Actuator V2 (Fiber-Optic Scanning)

The is the revamped edition of my original design, found here: http://www.thingiverse.com/thing:394306.
Designed as a linear scanning device for a fiber-optic carbon nano-crystal detector.

New features include:

guidance rail for shaft
fewer moving parts; simpler setup
dramatically reduced slop on moving axis (accurate to .5 mm)
greater travel range (4.5 cm)
small cavity under controller mount to store excess wire
fiber clamp at end of shaft

Find more info and discover some of my other projects at my blog: http://teamctrlaltdelete.weebly.com/
Questions about application or assembly? Just leave a comment.