Differences between revisions 130 and 196 (spanning 66 versions)
⇤ ← Revision 130 as of 2017-03-10 13:40:53 →
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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):
 * We removed the BF cap to debug the stepper motor. We checked the cabling but didn't find a problem. Eventually toggling the power to the driver box seemed to fix it.
 * We got the wheels removed from the two tall stepladders.
 * We started to rebalance the IM but came to realize that it was unstable for more than trivial pitch and roll (and had been for some time). We moved trim mass from top to bottom and it became unconditionally stable.
 * We rebalance the IM, put back the IRM and adjusted the OSEMs.
 * We took a successful TF in IM-L.
 * We added the security structure ring for below the SF and then added the SF. We noticed the cap is on at the wrong angle (so the keystone lock screws are inaccessible) but we can easily fix that.		 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.
Line 15: Line 15:
==== Plan for coming weeks ====
Next week:
 * Everyone (Mark, Fabian, Enzo, Perry Hirata-san) at Kamioka, Monday-Friday except for Hirata-san Wednesday-Friday).
 * Finish SF installation.
 * Finish BF cabling, hang BF/IRM/IM/RM/BS from SF and confirm weight matches load capacity.
 * Re-trim BF as necessary.
 * Get picomotor driver working.
Week after next:
 * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday.
 * Prepare for PI installation.
==== 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)