[Pansophy] Fw: C75-RI-011

[Gianluigi Ciovati]

Hi all,
there seems to have been a chain of unfortunate events that has prevented us to associate the end-groups serial numbers to the proper C75 cavity SN:

  *   During inspection of the cavities from which the end-groups were going to be cut, it was agreed to serialize the end-groups with "EG-cavity SN" and this is how they were recorded in the travelers C20-CAV-INSP-FPCEG and C20-CAV-INSP-HOMEG
  *   When the cavities arrived from RI and were inspected by CMM group, those end-group SNs were not available in the drop-down menu for the traveler C75-CAV-INSP so the end-group SNs were left undefined in the cavity inspection traveler
  *   After the end-groups SNs were added to the drop-down menus, I was informed yesterday that some of the EG SNs were "scratched out" and not visible.
  *   This morning, I asked Ashley to check the thickness of the FPC flange on cavity C75-RI-011 and she sent me the pictures below which indeed show that the end-group SNs were scratched out and replaced by some other nomenclature

How did the end-groups got the SNs scratched out and re-serialized? How was it decided?

Thanks for your help and for a) suggesting a fix to the issue, b) fix the issue, c) suggest ways to prevent similar issue to occur again.

Best regards,
Gigi

________________________________
From: Ashley Anderson Mitchell <ashleya at jlab.org>
Sent: Wednesday, February 10, 2021 10:35 AM
To: Gianluigi Ciovati <gciovati at jlab.org>; Kurt Macha <macha at jlab.org>
Subject: Re: C75-RI-011

Gigi,
 I took thickness at the 4 corners so as not to scratch the flange sealing surface.  Measurements are in inches:  0.3005, 0.3490, 0.3270, 0.3280

As for the SN#s, some are scratched out.
 FPC says FLG#3 and MM#2 (and cavity number in two places)
HOM says MM 4
[Image.jpeg]
[Image.jpeg]
[Image.jpeg]


________________________________
From: Gianluigi Ciovati <gciovati at jlab.org>
Sent: Wednesday, February 10, 2021 9:19 AM
To: Ashley Anderson Mitchell <ashleya at jlab.org>; Kurt Macha <macha at jlab.org>
Subject: Re: C75-RI-011

Hi Ashley,
yes, thank you, I'll update the traveler within the hour. Could you please do a quick caliper check of the thickness of the FPC flange? There seems to be some issues with the end-groups SNs being scratched out?

Thanks,
Gigi
________________________________
From: Ashley Anderson Mitchell <ashleya at jlab.org>
Sent: Wednesday, February 10, 2021 8:58 AM
To: Gianluigi Ciovati <gciovati at jlab.org>; Kurt Macha <macha at jlab.org>
Subject: C75-RI-011

Gigi,
C75-RI-011‘a processing traveler ends with us at the USC and I don’t see it on the schedule in the future.
I think it should need tuning, CMM and/or lapping next?

Thanks,

- Ashley Mitchell
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