[dsg-hallb_rich] [EXTERNAL] Re: Test of Grainger springs on mirror mounting points

[Marco Mirazita]

Hi Tyler,
the pair of washer must be there to have reliable adjustment of the 
mirror without putting stress on the rod and on the flange.
The second nut is ensuring that the adjustment cannot move anymore once 
we have found the best alignment. It will be inserted only at the end of 
the alignment of the mirrors on the RICH, for the moment it is not 
necessary.
Marco



Il 2021-10-18 14:26 Tyler Lemon ha scritto:
> Hi Marco,
> 
>  I can resend photos with the spherical washer and additional nut.
> 
>  Regardless, even without those two items, the spring seems to fit in
> the assembly.
> 
> -------------------------
> 
> From: Marco Mirazita <Marco.Mirazita at lnf.infn.it>
> Sent: Monday, October 18, 2021 4:56 AM
> To: Tyler Lemon <tlemon at jlab.org>
> Cc: dsg-hallb_rich at jlab.org <dsg-hallb_rich at jlab.org>; Patrizia Rossi
> <rossi at jlab.org>; Amrit Yegneswaran <yeg at jlab.org>
> Subject: [EXTERNAL] Re: Test of Grainger springs on mirror mounting
> points
> 
> Hi Tyler,
> there is one piece missing. After slide 4, the flange is fixed on the
> spring by a conical washer, a spherical washer and then the nut.
> I attached here drawings of the two washers and of the full assembly.
> Let me know if you can find all the parts, we can have a bluejeans
> meeting if you want.
> Marco
> 
> Il 2021-10-15 20:17 Tyler Lemon ha scritto:
>> Hi Marco Mirazita,
>> 
>>  I put together the parts if the mirror mounting points like we
>> discussed in this morning's meeting.
>> 
>>  The Grainger springs are stable and fit well in the grooves and
>> recesses of the mounting point parts.
>> 
>>  Attached are photos in series of how I put it together.
>> 
>>  Also, I was not able to find any spare springs from RICH-1. I
> looked
>> in all cabinets in EEL 124 cleanroom with RICH parts and the cabinet
>> in the EEL hallway with RICH parts. I did find one box with parts
>> similar to what you recently shipped me, but there were no springs.
>> 
>>  On a more positive note, I did find a fiber polishing kit in the
> RICH
>> cabinet in EEL 124, so we will be able to polish the d0 source fiber
>> next time we run tests.
>> 
>>  -Tyler
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