On 14/07/10 02:20, Adam Field wrote:
>> I'm designing a tool length measurement device for a mill.
>> I've settled on the mechanical design which is a tripod arrangement, but
>> what I'm after is some contacts to actually make and break the connections.
>> I know such beasts exist but I'm having difficulty finding sources for them.
>>
>> At the moment its looking like I'll have to settle with gold plated PCB
>> as the contact material.
>>
>> I'm looking for gold at the moment because I want to run the contacts at
>> a very low current/voltage to minimise arcing.
>>      
> Would pogo pins work for you? They are gold plated, spring loaded and
> come in a variety of point styles. These are usually used for in
> circuit programming and testing during manufacture.
>
> http://www.idinet.com/_FileLibrary/PDF/pg42.pdf
> http://mouser.com/ProductDetail/IDI/SX-0-ES-37-G/?qs=sGAEpiMZZMuSFBMFeRq2EWmzThOn%252bbiO
>    
Unfortunately no I need to reliably and respectably detect movement on 
the order of .001mm or better so spring loaded things wouldn't work
Basically the idea is to have 3 points of contact and then detect when 
one of them opens.

Thanks for the links though I have been after some info on pogo pins for 
programmers.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist