Differences between revisions 140 and 179 (spanning 39 versions)
⇤ ← Revision 140 as of 2017-04-27 19:31:10 →
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← Revision 179 as of 2017-08-18 13:24:57 → ⇥
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Deletions are marked like this. Additions are marked like this.
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At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): At Kamioka (Mark, Ohishi-san, Enzo, Yoshioka-kun, Kozu-kun):
 * We removed the LBB damper rings from the tank and passed them to Takahashi-san for recleaning. Unfortunately two screws galled, one holding on a Cu segment, and one holding on a joint piece.
 * We removed the LBB blade units from the PI, removed the blades and shipped them off for rework.
 * We pulled out all the old in-air cabling.
 * We laid about 9 new in-air cables.
 * We wrapped/labelled the BS mirror box, the winch system, the trolley adapters, and many other tools that we do not expect to use any time soon.
 * We connected up, tested and calibrated the BF LVDT.
 * We adjusted the ballast mass on the IM to make it hang level and at the right height. However we had to reduce the weight by a further 686 g relative to the plan of 2017-08-09. We found a combination that was good except for the fact that it used round masses on the bottom corners, so we decided to have the 641 g rectangular masses cut down by 60 g each. Mesco was able to do this within 24 hours. We will reclean the parts on Friday afternoon and swap them in on Monday.
At Mitaka (Hirata-san:
 * Hirata-san got a quotation about optical bench from Mirapro and contacted them about reducing cost.
 * He asked Suzuki-san (Tokyo university) to order them (delivery date is 10/24, so far).
 * He modified SR assembly frame design (from Fabian) and asked Mirapro for quotation.
 * He liaised with Koshin-shoko about modification of BS LBB blade springs.
 * He asked ATC for making t4.5 ballast mass for PR. He washed them and sent them to Kamioka with the PR thrust bearing.
 * He worked on the 3D model of SR3 SUS wires, and making a list for quotation.
Line 9: Line 23:
 * We craned in the PI.
 * We assembled the thrust bearing holder that receives the PI-SF rod. (The recess for the bearing was very slightly too small and had a burr near a retaining screw hole that prevented the bearing from seating properly, and so it required filing and re-cleaning.)
 * We hooked the SF and lowered the jacks under the SF to suspend the SF/... section.
 * The top filter rose when unlocked, and required about 1.8 kg to send it back down. Therefore we may be OK - the top filter seems to have about 8 kg more capacity than as measured by G&M. The hex cable clamp (≈0.25 kg) and the cables between the PI and SF still have to be added, but we can get an extra 3 kg by removing one of the three Cu damper segments (and rearranging the other two).
 * Hirata-san built and installed three LBB blade units.
 * Enzo kept debugging the SF LVDT. We repaired several broken wires, but it's still not behaving correctly. We suspect the ordering of the three coils (input output and excitation) may not be right. If so, we should be able to fix it with an adapter cable without removing the SF cap.		 ==== Plan for week of 8/21 ====
Vacation: Fabian (Mon)<<BR>>
Internship: Kozu-kun (Mon-Fri)<<BR>>
Line 16: Line 27:
==== Plan for coming weeks ====
For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]].		 Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri).
 * Swap in new IM ballast masses; readjust height and levelness.
 * Install side panels of IRM and OSEMs.
 * Route IRM OSEM cables, test/adjust IRM OSEMs.
 * Add BF cap; cable and test BF-1 and BF-2 picos.
 * Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
 * Crane in SF.
 * (Time permitting) Try TFs with optical sensors.
Mitaka: Hirata-san.
 * SR stuff.
Line 19: Line 38:
Week of 5/1:
 * No activity (Golden Week).		 ==== Plan for week of 8/28 ====
Kamioka: Mark, Ohishi, Fabian, Enzo, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.
 * Suspend BF/IRM/IM/RM/BS.
 * Install SF cap; route cables.
 * Lift and weigh SF/BF/IRM/IM/RM/BS.
 * Adjust SF ballast.
Line 22: Line 45:
Week of 5/8:
 * Commence work Tuesday 5/9.
 * Remove PI temporarily.
 * Continue debugging SF LVDT (removing cap if necessary).
 * Investigate possible mis-alignment between the tips of the LBB blades and the holes for the rods going down to the damper ring.
 * Add magnets to upper SF damper ring.
 * Reinstall PI, this time with rods and damper ring.
 * Reinstall PI-SF rod, this time with hex cable clamp.
 * Install PI yaw stepper.
 * Wire up PI yaw stepper and vertical fishing-rod steppers.
 * Route cables from SF to PI (may involve removing part of Cu damper).

Week of 5/15:
 * Enzo from Tuesday 5/16 (driving test), rest of team from Monday.
 * Prepare for PR2 bellows removal on 5/15 (move table with tools).
 * Wire up PI horizontal LVDTs and steppers.
 * Install geophones.
 * Unlock IP, re-level PI to center PI, add arc weights as required.
 		 ==== Vacation Info ====
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, Ohishi-san, Enzo, Yoshioka-kun, Kozu-kun):

  • We removed the LBB damper rings from the tank and passed them to Takahashi-san for recleaning. Unfortunately two screws galled, one holding on a Cu segment, and one holding on a joint piece.
  • We removed the LBB blade units from the PI, removed the blades and shipped them off for rework.
  • We pulled out all the old in-air cabling.
  • We laid about 9 new in-air cables.
  • We wrapped/labelled the BS mirror box, the winch system, the trolley adapters, and many other tools that we do not expect to use any time soon.
  • We connected up, tested and calibrated the BF LVDT.
  • We adjusted the ballast mass on the IM to make it hang level and at the right height. However we had to reduce the weight by a further 686 g relative to the plan of 2017-08-09. We found a combination that was good except for the fact that it used round masses on the bottom corners, so we decided to have the 641 g rectangular masses cut down by 60 g each. Mesco was able to do this within 24 hours. We will reclean the parts on Friday afternoon and swap them in on Monday.

At Mitaka (Hirata-san:

  • Hirata-san got a quotation about optical bench from Mirapro and contacted them about reducing cost.
  • He asked Suzuki-san (Tokyo university) to order them (delivery date is 10/24, so far).
  • He modified SR assembly frame design (from Fabian) and asked Mirapro for quotation.
  • He liaised with Koshin-shoko about modification of BS LBB blade springs.
  • He asked ATC for making t4.5 ballast mass for PR. He washed them and sent them to Kamioka with the PR thrust bearing.
  • He worked on the 3D model of SR3 SUS wires, and making a list for quotation.

Plan for week of 8/21

Vacation: Fabian (Mon)
Internship: Kozu-kun (Mon-Fri)

Kamioka: Mark, Ohishi, Fabian (Tue-Fri), Enzo, Yoshioka-kun (Tue, Wed, Fri).

  • Swap in new IM ballast masses; readjust height and levelness.
  • Install side panels of IRM and OSEMs.
  • Route IRM OSEM cables, test/adjust IRM OSEMs.
  • Add BF cap; cable and test BF-1 and BF-2 picos.
  • Lift and weigh BF/IRM/IM/RM/BS; adjust ballast mass.
  • Crane in SF.
  • (Time permitting) Try TFs with optical sensors.

Mitaka: Hirata-san.

  • SR stuff.

Plan for week of 8/28

Kamioka: Mark, Ohishi, Fabian, Enzo, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun.

  • Suspend BF/IRM/IM/RM/BS.
  • Install SF cap; route cables.
  • Lift and weigh SF/BF/IRM/IM/RM/BS.
  • Adjust SF ballast.

Vacation Info

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)