Differences between revisions 136 and 142 (spanning 6 versions)
⇤ ← Revision 136 as of 2017-04-07 13:21:26 →
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← Revision 142 as of 2017-05-18 17:18:39 → ⇥
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Editor: MarkBarton
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Deletions are marked like this. Additions are marked like this.
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 * We set things up again after the floor coating work.
 * We moved the PI into the second floor of the cleanbooth:
  * We cleared a path for the forklift (moving the portable cleanroom, worktable, power cables, vacuum pumps and other obstacles).
  * We got Saito-sensei to move the PI to the +Y side of the cleanbooth.
  * We washed and cling-wrapped a pallet.
  * We got Miyoki-san to disconnect the cables and curtain blocking the crane slot (and reconnect them afterwards).
  * We added some temporary crossbars in the top of the assembly frame and stored the SF cap on them to get it out of the way.
  * We craned in the pallet and set it up to bridge three floor joists.
  * We craned in the PI using Saito-san's adapter.
   * We couldn't find the original screws for the three PI transport plates so we substituted some others - fortunately there was no galling.
   * We had to connect the adapter to the crane with a sling because the ring for the hook was slightly too small).
 * We did a lot of cabling work:
  * We routed all the BF cables over the BF cap, up through the cable clamp on the SF-BF rod and up to the SF. (We had to redo a few because the Type 3 cable was at the flange end instead of the Type 1.)
  * We connected up the SF LVDT and FR stepper.
  * We started on rebalancing the BF (which had been perturbed by the weight and tension of all the cables). We got it rather better, but it needs more work.
  * We made another batch of anti-feedthrough adapters.
 * 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 pig 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 cleared space for the PR2 team to remove a bellows from their tank.
 * We installed safety bars near the assembly frame at about waist height for someone on the tall ladder. We reinforced the clamps with cable ties.
 * 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 removed the SF cap and stored it on crossbars within the assembly frame.
 * 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 removed one segment of the Cu ring on the SF cap and reconfigured the rest 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 ,
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Week of 4/10:
 * Hirata-san does scissor lift training 4/10.
 * Perry in Tokyo 4/10.
 * Debug/fix dead OSEM channel, TM-H4.
 * Debug BF/SF LVDTs.
 * Adjust BF pitch/roll.
 * Do TF from SF LVDT actuation.
 * Install temporary ballast mass in SF.
 * Lift SF/BF/... section and check total weight and SF balance.
 * Continue swap of PI LVDT connectors (female->male)
 * Start preparing LBB spring units.
 * Install pico drivers in rack, create MEDM interface (with Miyo-kun), and undo temporary connection of picos to old controller and joystick.
Week of 4/17:
 * Crane in PI.
 * Connect SF/BF... section.
 * Temporarily remove PI and adjust SF ballast if necessary.		 Week of 5/15:
 * Enzo from Tuesday 5/16 (driving test), rest of team from Monday.
 * Fix PI-SF rod jamming.
 * Remove PI and SF cap.
 * Continue debugging SF LVDT.
 * Reconfigure Cu damper ring on SF.
 * Add magnets to upper SF damper ring.
 * Add cable clamps on the PI (a few places are inaccessible when the PI is on the assembly frame).
 * 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.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):

  • 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 pig 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 cleared space for the PR2 team to remove a bellows from their tank.
  • We installed safety bars near the assembly frame at about waist height for someone on the tall ladder. We reinforced the clamps with cable ties.
  • 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 removed the SF cap and stored it on crossbars within the assembly frame.
  • 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 removed one segment of the Cu ring on the SF cap and reconfigured the rest 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 ,

Plan for coming weeks

For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.

Week of 5/15:

  • Enzo from Tuesday 5/16 (driving test), rest of team from Monday.
  • Fix PI-SF rod jamming.
  • Remove PI and SF cap.
  • Continue debugging SF LVDT.
  • Reconfigure Cu damper ring on SF.
  • Add magnets to upper SF damper ring.
  • Add cable clamps on the PI (a few places are inaccessible when the PI is on the assembly frame).
  • 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.

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