From: jeroen@nospam.please   
      
   On 27/02/18 22:25, malua mada! wrote:   
   > I need to bleed static out of a moving aluminum structure. I have a springy   
   aluminum tongue (flashing) wiping on an aluminum arm (flat stock 1").   
   > Continuity is good to start with but after a year or so fails. Wiping   
   pressure is still fine, and continuity between any two points on either tongue   
   *or* arm is fine but not between the two pieces.   
   > I thought this was an improvement on a copper wire connection that would   
   fatigue and break.   
   > I also thought it would be self cleaning.   
   > Thanks for any insights   
   >   
      
   Sliding contacts on aluminium will always fail. Sliding *anything*   
   on aluminium is bound to fail. Either attach a pad of CuBe or   
   some other Cu alloy to one side and have your moving contact slide   
   on that, or perhaps attach a piece of thin piano wire between the   
   moving parts in such a way that it never exceeds its elastic limit.   
      
   Jeroen Belleman   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)