Differences between revisions 142 and 189 (spanning 47 versions)
⇤ ← Revision 142 as of 2017-05-18 17:18:39 →
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Editor: MarkBarton
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← Revision 189 as of 2017-09-08 20:36:09 → ⇥
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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, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
 * We characterized the remachined LBB blades, chose three and installed them in the LBB blade units in the PI.
 * We removed all sticky labels from the PI and cleaned the affected areas (and as much as possible of the rest of the surface) with ethanol.
 * We rearranged the arc weights on the PI to make space for the magic wand and installed the magic wand.
 * We rearranged the magnets on the SF damper ring to suit three Cu segments (instead of two as in the test hang).
 * We put proper vacuum-compatible tubing around all the stepper motor connections on the top of the PI (replacing cling wrap).
 * We craned out the SF temporarily and retrieved the lost PEEK cable clamp collet from the BF.
 * We closed the BF, craned the SF back in, and hooked the BF/..., this time with the hex cable clamp.
 * We routed cables from the BF via the hex cable clamp to the SF level.
 * We adjusted the BF trim mass for pitch, roll and vertical, and got the IRM hanging symmetrically around the IM.
 * We adjusted all the IRM OSEMs laterally and in/out.
 * We calibrated the SF LVDT and tested the SF FR stepper.
 * We suspended the SF/... section and weighed it but found the old 7-mm maraging rod adapter did not hold it at the center, so we had to lift it with slings and could not accurately trim it for pitch/roll.
 * Therefore we brought forward the craning in of the PI with the SF damper ring hanging from it.
 * We suspended the SF successfully from the PI and unlocked the F0 keystone to check the mass budget. We needed about 1.5 kg extra, which is about right considering the hex cable clamp and cables.
 * However we had to leave out the F0-SF hex cable clamp because of a bad thread on the inside of the cap. Hirata-san will make a new cap by enlarging the 7-mm hole in an old cap to 8 mm.
Line 9: Line 24:
 * 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 week of 9/13 ====
Mark (except Wed), Fabian (except Mon, Tue), Enzo, Ohishi-san (except Mon-Wed), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
 * Reinstall F0-SF rod, this time with hex cable clamp.
 * Route cables.
 * Adjust SF trim mass, adjust tilt and vertical.
 * Adjust SF damper gap.
 * Cable and test IP LVDTs.
 * Cable and test F0 LVDT.
 * Cable and test PI steppers.
 * Cable and test geophones.
 *
==== Plan for week of 9/19 ====
No work Mon 9/18 (敬老の日)<BR>
Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
 * Install LBB damper rings.
 * Install suspension.
Line 20: Line 41:

==== 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.
 		 ==== 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, Kozu-kun):

  • We characterized the remachined LBB blades, chose three and installed them in the LBB blade units in the PI.
  • We removed all sticky labels from the PI and cleaned the affected areas (and as much as possible of the rest of the surface) with ethanol.
  • We rearranged the arc weights on the PI to make space for the magic wand and installed the magic wand.
  • We rearranged the magnets on the SF damper ring to suit three Cu segments (instead of two as in the test hang).
  • We put proper vacuum-compatible tubing around all the stepper motor connections on the top of the PI (replacing cling wrap).
  • We craned out the SF temporarily and retrieved the lost PEEK cable clamp collet from the BF.
  • We closed the BF, craned the SF back in, and hooked the BF/..., this time with the hex cable clamp.
  • We routed cables from the BF via the hex cable clamp to the SF level.
  • We adjusted the BF trim mass for pitch, roll and vertical, and got the IRM hanging symmetrically around the IM.
  • We adjusted all the IRM OSEMs laterally and in/out.
  • We calibrated the SF LVDT and tested the SF FR stepper.
  • We suspended the SF/... section and weighed it but found the old 7-mm maraging rod adapter did not hold it at the center, so we had to lift it with slings and could not accurately trim it for pitch/roll.
  • Therefore we brought forward the craning in of the PI with the SF damper ring hanging from it.
  • We suspended the SF successfully from the PI and unlocked the F0 keystone to check the mass budget. We needed about 1.5 kg extra, which is about right considering the hex cable clamp and cables.
  • However we had to leave out the F0-SF hex cable clamp because of a bad thread on the inside of the cap. Hirata-san will make a new cap by enlarging the 7-mm hole in an old cap to 8 mm.

Plan for week of 9/13

Mark (except Wed), Fabian (except Mon, Tue), Enzo, Ohishi-san (except Mon-Wed), Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun

  • Reinstall F0-SF rod, this time with hex cable clamp.
  • Route cables.
  • Adjust SF trim mass, adjust tilt and vertical.
  • Adjust SF damper gap.
  • Cable and test IP LVDTs.
  • Cable and test F0 LVDT.
  • Cable and test PI steppers.
  • Cable and test geophones.

Plan for week of 9/19

No work Mon 9/18 (敬老の日)<BR> Mark, Fabian, Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun

  • Install LBB damper rings.
  • Install suspension.

Vacation Info

Mark: 10/16-24

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