40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  OMC elog  Not logged in ELOG logo
Message ID: 358     Entry time: Thu May 9 16:07:18 2019
Author: Stephen 
Type: Mechanics 
Category: General 
Subject: Improvements to OMC Bonding Fixture 

[Stephen, Koji]

As mentioned in eLOG 331, either increased thermal cycling or apparent improvements in cured EP30-2 strength led to fracture of curved mirrors at unintended locations of bonding to the PEEK fixture parts.

The issue and intended resolution is summarized in the attached images (2 different visualizations of the same item).

Redline has been posted to D1600336-v3.

Drawing update will be processed shortly, and parts will be modified to D1600336-v4.

 

Attachment 1: image_of_issue_with_OMC_PZT_bonding_fixture_from_D16003336-v3.png  15 kB  Uploaded Thu May 9 17:23:21 2019  | Hide | Hide all
image_of_issue_with_OMC_PZT_bonding_fixture_from_D16003336-v3.png
Attachment 2: image_02_of_issue_with_OMC_PZT_bonding_fixture_from_D16003336-v3.PNG  206 kB  Uploaded Thu May 9 17:23:32 2019  | Hide | Hide all
image_02_of_issue_with_OMC_PZT_bonding_fixture_from_D16003336-v3.PNG
ELOG V3.1.3-