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[Maowu Nie <nie AT rcf.rhic.bnl.gov>]

Hi Zhenyu,

We just got reply from the company, they don’t have any experience in 
shortening the screws and there are also many potential risks that they 
cannot afford.
Option 2 or 3 might be safer at current stage.

Regards,
Maowu & Jianing


在 2021-02-23 06:04，Ye, Zhenyu 写道：
> Maowu, thanks for confirmation.
>
> There might be one small issue. The screws of the connectors on the
> T-board seem to be a little bit too long, so that it creates a small
> conflict with the module peek mechanical structure (MS). See page 3 in
> Xu’s presentation from last week’s FST meeting [1]. It seems to me
> that one can still press the T-board to fasten with the MS through the
> four corner holes. But the T-board and/or the MS has a tiny bend. As
> this observation is not fully consistent with what Yi reported in [2],
> I have asked Yi to check again.
>
> If the answer is yes, I see 3 options
>
> 1. Shorten the screws (I don’t think it is possible but Maowu please 
> confirm)
> 2. Leave as is
> 3. Add a washer between T-board and MS
>
> A related question for the group is whether we should use PEEK
> screws/nuts to use to fasten T-board onto MS, as pointed out in Yi’s
> slides. I don’t recall we have come to a conclusion at the meeting (?)
> but we should decide soon.
>
> Please comment.
>
> Thanks,
> Zhenyu
>
> [1] 
> https://drupal.star.bnl.gov/STAR/system/files/FstModuleAssemblyFeb08Feb142021.pdf
> [2] 
> https://drupal.star.bnl.gov/STAR/system/files/20201123_FST_MS_YiYang.pdf
>
>
> > On Feb 22, 2021, at 3:21 PM, Maowu Nie <maowu.nie AT email.sdu.edu.cn> 
> > wrote:
> >
> > Hi Zhenyu,
> >
> > Thanks for the reminder, we will work on it.
> >
> > Regards,
> > Maowu
> >
> >
> > > On Feb 22, 2021, at 11:07 PM, Ye, Zhenyu <yezhenyu AT uic.edu> wrote:
> > >
> > > Hi Maowu, Jianing,
> > >
> > > We have tested the new T-boards/purple cables in the readout and 
> > > found no problem.
> > > Please go ahead with the T-board assembly and testing.
> > >
> > > Best,
> > > Zhenyu
> > >
> > > > On Nov 11, 2020, at 4:12 AM, Maowu Nie <maowu.nie AT email.sdu.edu.cn> 
> > > > wrote:
> > > >
> > > > Hi Mike and Yi,
> > > >
> > > > We just finished the QC test of the first 10 sets of T-board , and 
> > > > will send them to you soon.
> > > >
> > > > Please confirm the following address for you is correct or not:
> > > >
> > > > 8 sets to Mike:
> > > > Brookhaven National Laboratory, Shipping Department- Building 98 
> > > > Upton, NY 11973,
> > > > Michael Capotosto, capotosto AT bnl.gov.
> > > >
> > > > 2 sets to Yi:
> > > > No.1 University Rd., East District, Tainan City, 70101
> > > > National Cheng Kung University, Department of Physics,
> > > > Yi Yang
> > > >
> > > > One thing I need to mention to you, the nuts in the connector have 
> > > > the shedding risk.
> > > > So when you do installation, please make sure the screw is well 
> > > > tightened.
> > > >
> > > > Regards,
> > > > Maowu
>
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