Differences between revisions 77 and 168 (spanning 91 versions)
⇤ ← Revision 77 as of 2016-10-20 23:49:10 →
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Editor: MarkBarton
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← Revision 168 as of 2017-07-21 14:12:00 → ⇥
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Editor: MarkBarton
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 * Type B Past Week Summary
  * Fabian, Mark and Liu-kun did BS installation at Kamioka:
   * They replaced the thrust bearing in the BF with a stainless version. While replacing the picomotor spring, they found several issues with screws.
   * They removed the sheet metal cable clamp on the bottom of the BF and installed a redesigned one.
   * They installed the "flying saucer" cable clamp on the maraging rod between the IM and BF, and attached the cables. There was an issue with the cables from the bottom OSEMs, which are too short by about 300 mm.
   * They suspended the IM. Relative to the mass budget, about 700 g of trim mass had to be taken off to get good balance. There was also a problem with rubbing. It turned out that the keystone and the attached central PEEK coil former for the LVDT were at an angle, and the inside of the coil former was fouling on the outside of the pole piece for the magnets. It's not yet clear why the keystone was misaligned.
  * Hirata-san:
   * Made drawings of (revised) stub flag gluing jigs.
   * Worked on BS full-assembly drawings for Saito-sensei.
   * (For other groups)
    * Made a 3D model of maraging wires.
    * Finished making drawings of PRM inner frame.
    * Worked on re-setting up PC after crash.
 * Longer term to-do list
  * Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing.
   * Part "disk security" top has to be modified - screw positions do not match.
  * Write more of payload assembly procedure (Fabian) - ONGOING
  * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING
  * Lower breadboard installation to be incorporated into the procedure document.
  * Work on BS simulation (Fabian)
  * Do BS Simulink model (Mark, Kokeyama) - TM/IM/BF level DONE
  * Do 2D drawings of SR2 parts (Hirata)
  * Redesign SRx IM wire clamps for larger prisms, remachined RMs
  * Order SRM/PRM parts (Hirata/Shoda)
  * Order SRx fasteners (Hirata)		 === Type B (Mark) ===
==== Past week report ====
At Kamioka (Mark, Enzo, Hirata-san, Yoshioka-kun):
 * We lubricated the stuck screw at the top of the security structure with stuck and were able to remove it.
 * Enzo disconnected and removed or coiled many in-vac cables at the PI level to free it.
 * We craned the PI. There was a minor safety incident - see below.
 * Hirata-san set up the filter service area, and we moved in a BF intended for one of the SRs (BF#3).
 * Fabian and Hirata-san worked out a method for characterizing a single spring, and Fabian finished characterizing the first one.
 * We did a big tidy-up and clean-up of the area, especially the corner where we intended to do the gluing.
 * We set up the BS gluing jigs and applied the glue. We will check the results on Monday.
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  ==== Plan for week of 7/24 ====
Full team at Kamioka from Mon-Fri, except Hirata-san (Tue-Fri) and Enzo (vacation).
 * Check results of gluing.
 * Finish disassembly.
 * Finish BF rebuild.
 * Remove LBB rings.
 * Recheck alignment of assembly frame and centering of optical table.
 * Install IM, suspend BS and RM.

==== Plan for week of 7/31 ====
Full team at Kamioka from Mon-Fri, except Fabian (Mon-Thu) and Enzo (vacation).
 * Weigh/trim BS/RM/IM.
 * Bring in rebuilt BF.

Vacation Info:
Hirata-san: Thu 7/20 through Mon 7/24
Enzo: Sat 7/22 through Sun 8/6
Fabian: Fri 8/4 through Mon 8/21
Mark: TBD Mid-Oct

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Enzo, Hirata-san, Yoshioka-kun):

  • We lubricated the stuck screw at the top of the security structure with stuck and were able to remove it.
  • Enzo disconnected and removed or coiled many in-vac cables at the PI level to free it.
  • We craned the PI. There was a minor safety incident - see below.
  • Hirata-san set up the filter service area, and we moved in a BF intended for one of the SRs (BF#3).
  • Fabian and Hirata-san worked out a method for characterizing a single spring, and Fabian finished characterizing the first one.
  • We did a big tidy-up and clean-up of the area, especially the corner where we intended to do the gluing.
  • We set up the BS gluing jigs and applied the glue. We will check the results on Monday.

Plan for week of 7/24

Full team at Kamioka from Mon-Fri, except Hirata-san (Tue-Fri) and Enzo (vacation).

  • Check results of gluing.
  • Finish disassembly.
  • Finish BF rebuild.
  • Remove LBB rings.
  • Recheck alignment of assembly frame and centering of optical table.
  • Install IM, suspend BS and RM.

Plan for week of 7/31

Full team at Kamioka from Mon-Fri, except Fabian (Mon-Thu) and Enzo (vacation).

  • Weigh/trim BS/RM/IM.
  • Bring in rebuilt BF.

Vacation Info: Hirata-san: Thu 7/20 through Mon 7/24 Enzo: Sat 7/22 through Sun 8/6 Fabian: Fri 8/4 through Mon 8/21 Mark: TBD Mid-Oct

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-10-28 10:02:46 by fabian.arellano)