Differences between revisions 126 and 196 (spanning 70 versions)
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Editor: MarkBarton
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At Kamioka (Mark, Fabian, Enzo, Hirata-san):
 * We improvised a solution for ballast mass on the BF, using some heavy dog clamps meant for pedestals, washed and wrapped in foil. We we use them for the duration of the BS Test Hang and then swap them out for custom masses.
 * We rearranged the BS rack, closing the gaps between boxes (per request of Miyakawa-san. We also renumbered some boxes, connectors and cables so as to use zero-based numbering (#0, #1, #2,...) throughout.
 * We routed the OSEM cables into the external cable rack (rather than through the PR2 area).
 * We connected up the BF LVDT, and BF fishing rod stepper motor.
 * We installed a signal generator for the LVDT.
 * We connected the super motor driver box to the Internet and attempted to set it up, but with no success so far.
 * We found the final picomotor driver (we have been using the one from TAMA in the clean booth).
 * We found many items that we will need soon, including the copper ring for the SF.
 * We found issues with the digital system (the computer driving the rack had been changed from k1pr2 to k1bs, which causes problems) and worked with DGS to fix them. It now mostly works but the real-time model crashes from time to time.		 At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun):
 * We moved or covered stuff in the BS cleanbooth to prepare for the SR2 crane slot cutting and BS-> SR2 assembly frame move.
 * We put the service port covers back on at the BF level of the BS tank.
 * We used the PI jacks to center the bottom of the security structure around the RM.
 * We debugged a mechanical issue where the #2 IP LVDT had too narrow a gap between the moving and fixed parts, so that there was interference with only a very small clockwise yaw of the IP. We fixed it by moving the bottom baseplate (taking advantage of the fact that it was held by screws in oversize holes for this purpose).
 * We used the IP FRs to center the IP.
 * We set the gains on the IP LVDT driver.
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==== Plan for coming weeks ====
 * Everyone (Mark, Fabian, Enzo, Hirata-san) next week at Kamioka
==== Plan for week of 10/2 ====
Kamioka: Mark, Enzo (Tue-Fri), Ohishi-san, Kozu-kun.
 * Finish preparation for SR2 work.
 * Debug electronics, especially actuation.
 * Tune IP, do LVDT/stepper calibration.
 * Remove First Contact, try OL.
Mitaka: Fabian, Hirata-san
 * Design ballast for LBB.
 * Design improved PI yaw adjustment.
 * SR procurement.

==== Plan for week of 10/10 ====
Holiday Mon 10/9, Open Day prep Fri 10/13.<<BR>>
 * TFs, final preparation for alignment in week of 10/16.

==== Plan for week of 10/16 ====
Kamioka: all but Mark
 * Work with alignment team.

==== Vacation Info ====
Mark: 10/16-24

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, Fabian, Enzo, Hirata-san, Yoshioka-kun):

  • We moved or covered stuff in the BS cleanbooth to prepare for the SR2 crane slot cutting and BS-> SR2 assembly frame move.

  • We put the service port covers back on at the BF level of the BS tank.
  • We used the PI jacks to center the bottom of the security structure around the RM.
  • We debugged a mechanical issue where the #2 IP LVDT had too narrow a gap between the moving and fixed parts, so that there was interference with only a very small clockwise yaw of the IP. We fixed it by moving the bottom baseplate (taking advantage of the fact that it was held by screws in oversize holes for this purpose).
  • We used the IP FRs to center the IP.
  • We set the gains on the IP LVDT driver.

Plan for week of 10/2

Kamioka: Mark, Enzo (Tue-Fri), Ohishi-san, Kozu-kun.

  • Finish preparation for SR2 work.
  • Debug electronics, especially actuation.
  • Tune IP, do LVDT/stepper calibration.
  • Remove First Contact, try OL.

Mitaka: Fabian, Hirata-san

  • Design ballast for LBB.
  • Design improved PI yaw adjustment.
  • SR procurement.

Plan for week of 10/10

Holiday Mon 10/9, Open Day prep Fri 10/13.

  • TFs, final preparation for alignment in week of 10/16.

Plan for week of 10/16

Kamioka: all but Mark

  • Work with alignment team.

Vacation Info

Mark: 10/16-24

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