Homebrew PCBs

Plastic on aluminum is a great bearing surface.  I would recomend UHMW 
(Ultra High Melecular wight) plastic.  You can purchase it at 
www.mcmaster.com and some woodworking stores carry it.  Woodworkers 
use it for making jigs and fixtures etc.

I used it for the "bearing" surfaces on the way system for my CNC 
router, works great and tolerates dust and chips really well.




--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
> On Thu, 23 Jun 2005 15:52:47 +0200, David McNab <david@r...>  
> wrote:
> 
> >
> > Can someone recommend better ways to do the tracks, using 
inexpensive
> > and easily available materials that don't need specialised tools to
> > deploy? Preferably materials which can be easily sourced in a 
small city
> > without 8 hours searching the Yellow Pages?
> 
> 
> Al on Al is bad, better make plastic on Al or even better plastic on 
steel.
> 
> ST