[Halld-tracking-hw] Stand-off sketch ...

[Fernando J. Barbosa]

Hi Curtis,

How do you plan to keep all these parts from rotating once installed?

How do you plan to make the GND connections from the connector? Please 
provide a sketch with details.

Thanks and best regards,
Fernando

Curtis A. Meyer wrote:
> Attached is a rough sketch showing the proposed stand-off scheme.
> 1) A 6/32 blind threaded hole is drilled in the endplate.
>
> 2) A 6/32 set screw is screwed into the hole. We can use conducting
>    epoxy to improve the connection if needed.
>
> 3) A 1/4 inch electrical standoff with a 6/32 tapped hole is screwed onto
>    the set screw. There are three possible variations on this for the end
>    in contact with the endplate.
>    i) There is room for the 1/4 inch, nothing specicial
>    ii) There is not quite enough room for the 1/4 inch due to the  
> heads of
>         the feedthrus extending 1/10" above the surface of the plate.
>         We can order a standard 1/4 standoff that has a diameter of 
> 188 for the
>         last .133 inches. This comes from McMaster-Carr.
>    iii) Or we can make in house modifications:
>          a) we can (in house as needed) taper the end of the standof 
> down to ~188
>              from 250 so it will fit,
>          b) we can (in house) as needed remove some material from the 
> head
>              of the feed throughs so that the 1/4 in can reach the 
> endplate.
>
> 4) A .156 inch hole is drilled through the lucite plate.
>
> 5) A 6/32 set screw goes through the lucite plate and screws into the 
> standoff.
>
> 6) Epoxy, or conducting epoxy in placed around the 6/32 set screw.
>
> 7) A  1/4 inch electrical standoff with blind 6/32 holes is screwed
>
> 8) The connector is attached to the standoff.
>
> We also would like to propose the standoffs that hold the HV card be 
> on opposite
> sides of the card, rather than both on the same side. This gives less 
> chance that the
> card will tilt during installation and removal.
>
> @===  High-voltage board
> O          Standoff/set screw of installation/removal.
>
>                                   O
>                                @=============================@
>                                                                                                   
> O
>
> Curtis, Gary and Yves
>
> ------------------------------------------------------------------------
>
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