> in the past for robotics applications I have used a Worm drive or
> threaded rod

Threaded rod gives you a lot of mechanical advantage, plus it stops
the arm moving under external forces. My local hardware store has
several diameters in metre lengths and it's not expensive. It could be
used as an actuator on the non-road side of the pivot point

Joe


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5577 / Virus Database: 4257/8899 - Release Date: 01/09/15

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.