Hole tolerances for FDC circuit boards

[Tim Whitlatch <whitey@jlab.org>]

Thanks Fernando,

We will use the .001 dia and .002 position. This gives a possible out of 
position of .0025 (60 microns) from wire plane to wire plane using the 
standard holes on the circuit board. If better positioning is required, 
we would have to do some additional machining after assy.

Cheers,

       Tim

Fernando J. Barbosa wrote:
> Hi Tim,
>
> The tolerances for hole size and positioning vary from 
> company-to-company. I got the link from Kim for the company that is 
> doing the prototypes for the FDC wire planes and there is no list of  
> tolerances.
>
> I took a brief survey of a few companies and the hole size tolerance 
> was 0.001" and the hole positioning tolerance was 0.002" for advanced 
> technology boards. For standard technology, those numbers can double.
>
> Regards,
> Fernando
>
>

-- 
ÐÏࡱá

begin:vcard
fn:Timothy Whitlatch, PE
n:Whitlatch;Timothy
tel;work:757-269-5087
tel;fax:757-269-5279
version:2.1
end:vcard