Differences between revisions 77 and 217 (spanning 140 versions)
⇤ ← Revision 77 as of 2016-10-20 23:49:10 →
Size: 2312
Editor: MarkBarton
Comment:
← Revision 217 as of 2018-01-19 13:48:30 → ⇥
Size: 1817
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 5: Line 5:
 * 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) ===
==== Report for week of 1/15 ====
 * We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL.
 * Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs.
 * We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget.
 * We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF.
 * We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF.
 * We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side).
 * We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g.
 * Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs.
 * Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in.
 
==== Plan for week of 1/22 ====
 * Fix or swap BF.
 * Route selected cables to flange.
 * Test IM picos and BF yaw pico.
Line 31: Line 22:
  ==== Plan for week of 1/29 ====
 * Enzo at Mitaka 1/29 and most of 1/30, then vacation.
 * Kozu-kun away.
 * All others at Kamioka.
 * Build IRM around IM.
 * Cable/test/adjust IM OSEMs.
 * Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.

==== Vacation Info ====
 * Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
 * Kozu-kun 1/29-2/2

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Report for week of 1/15

  • We set up the QPD for the OL, initialized the OL and TM sections of the RTM, and did TFs from the TM OSEMs to the OL.
  • Initially we had no coherence, but we debugged issues with the watchdog, LPCD, and DAC board and then got good TFs.
  • We lifted the IM/RM/SR with the load gauge adapter and checked the weight, which was close to the mass budget.
  • We installed the section of the AF above the IM, and the BF cross bars and jacks, and craned in the BF.
  • We installed the BF-IRM rods, IRM, BF-IM rod, flying saucer and the cable clamps on the bottom of the BF.
  • We hooked the IM section, but found it was heavy by several hundred grams. We also noticed the BF keystone had a noticeable tilt of about 1.2 mm (high on the +X side).
  • We removed 738 g of trim mass and found that load rose and sat about 2 mm high. So the discrepancy is of order 500-600 g.
  • Shoda-san, Enzo and Kozu-kun made and characterized a batch of OSEMs.
  • Hirata-san finished drawings for the improved BS PI yaw/vertical adjustment, placed orders for damping ring receptacles and other items, and prepared the second SR BF in case we needed to swap it in.

Plan for week of 1/22

  • Fix or swap BF.
  • Route selected cables to flange.
  • Test IM picos and BF yaw pico.

Plan for week of 1/29

  • Enzo at Mitaka 1/29 and most of 1/30, then vacation.
  • Kozu-kun away.
  • All others at Kamioka.
  • Build IRM around IM.
  • Cable/test/adjust IM OSEMs.
  • Time permitting, do TFs from IM OSEMs to themselves and to optical sensor.

Vacation Info

  • Enzo 1/30-2/19 (at Mitaka 1/29, part of 1/30)
  • Kozu-kun 1/29-2/2

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