Differences between revisions 143 and 179 (spanning 36 versions)
⇤ ← Revision 143 as of 2017-05-18 18:34:50 →
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← Revision 179 as of 2017-08-18 13:24:57 → ⇥
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Editor: MarkBarton
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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 cleared space for the PR2 team to remove a bellows from their tank.
 * We installed safety bars on the pillars near the assembly frame at about waist height for someone on the tall ladder. We reinforced the clamps with cable ties.
 * We bridged a gap in the second floor on the -X side of the SF2 tank with spare floor panels.
 * We removed the PI from the assembly frame.
 * We encountered a problem with the PI-SF rod jamming in the SF. We finally got it out by clamping a pair of vice grips to the rod and hammering. We found that the receptacle part was the right size (7.0 mm) but had been deformed around the edge. Hirata-san used a knife and sandpaper to lean up the edge and then ultrasonically cleaned it.
 * We removed the LLB blade units from the PI, removed the blades from the clamps and sent the blades away for more rework to fix the length problem. Fortunately the tab section at the tip is fairly long, so we can just add a second hole further from the end.
 * We tested the SR fishing rod again, but it would only go up, not down. We found that reseting the driver fixed it, but we also moved the driver boxes into the cleanbooth to reduce the length of the motor cables. (Instead, we had to run some long DC and LAN cables.)
 * We adjusted the limit nut on the SF fishing rod to increase the range.
 * We debugged an issue with the SF keystone sitting lower than previously and found we had accidentally left two eyebolts on top of the BF. We retrimmed the BF/... section to reset the keystone to nominal (65.5 mm) with the fishing rod at mid-range.
 * We removed one segment of the Cu ring on the SF cap and reconfigured the other two to be symmetrical.
 * Fabian designed a layout for the SF damper ring magnets that would work with the modified Cu ring, and placed the magnets with the template. The poles of the magnets were not on the expected faces so we had to stand the magnets up, with the 12x12 faces sideways and the 10x12 mm pole faces up/down. We will need to raise the magnet ring by 2 mm to allow for the extra height.
 * Hirata-san made a cable for the PI v vertical LVDT. We identified the coils by their resistances which were similar to BF/SF: Primary 193Ω, Secondary 75Ω, Actuation 112Ω.
 * We added the remaining cable clamps to the PI (some places had not been accessible with the PI on the frame).
 * We placed the geophones but discovered we didn't have some mounting brackets called out in the 3D CAD.
 * Enzo made a PI yaw/vertical stepper adapter cable and a trial geophone descrambler cable (one of three).
 * We found that part of the problem with the SF LVDT was that the actuation had not been enabled for SF or F0 in the real-time model. We fixed the model and are now able to drive the LVDT actuator and see input at the LVDT sensor.		 ==== Plan for week of 8/21 ====
Vacation: Fabian (Mon)<<BR>>
Internship: Kozu-kun (Mon-Fri)<<BR>>
Line 26: 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 29: Line 38:
Week of 5/22:
 * Reinstall PI, this time with rods and damper ring.
 * Reinstall PI-SF rod, this time with hex cable clamp.
 * Prepare for PR2 bellows removal on 5/15 (move table with tools).
 * Cable/test PI horizontal LVDTs and steppers.
 * Install/cable/test geophones.
 		 ==== 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

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)