Differences between revisions 121 and 168 (spanning 47 versions)
⇤ ← Revision 121 as of 2017-02-03 13:33:12 →
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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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Deletions are marked like this. Additions are marked like this.
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 * Hirata-san:
  * Made BS disposable wire clamp 3Dmodel and drawings.
  * Made ballast mass drawings for BS Bottomfilter and Standardfilter.
  * Made parts list and screw list for disposable wire clamp and ballast mass.
  * Sent drawings and lists to i-ject for quotation.
  * Start to make drawings for SR big parts (optical bench,damper rings,sus wires,cable clamps) - ongoing.
 * Mark, Fabian and Enzo (at Kamioka):
  * Realized that some of the imbalance in the BF was from the fishing rod and calculated a new set of blade offsets to center the rod but leave the torque from the FR to be cancelled by the trim mass for now.
  * Applied the blade offsets and checked that the BF hung as expected.
  * Found that the yoke was rubbing again and corrected it by putting it at an angle matching the keystone.
  * Found that the cables were adding too much stiffness and friction and rerouted them.
  * Found that the GAS was unstable and reduced the compression symmetrically to get 0.37 Hz.
  * Rebalanced the IM to set the right pitch, yaw and height.
  * Tested the IM picos. Unfortunately the pitch pico stuck near or at one end of its range and we will need to take the end plate off the IM to find out what is wrong.		 === 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

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)