Differences between revisions 141 and 189 (spanning 48 versions)
⇤ ← Revision 141 as of 2017-05-12 13:38:40 →
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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 counted the used/broken/unused/need cables for Type B.
 * Hirata-san and Mark installed blades in three LBB blade units.
 * Hirata-san checked the LBB blade units to see how badly the blade tips were misaligned. The bases will need to be moved towards the clamp end by 21 mm. It is probably not feasible to turn the screw holes into slots, so an adapter part will need to be designed.
 * We checked that the new in-vacuum geophone cables that Takahashi-san had got for us were the proper new-style ones. (Thus we will need in-air descrambler cables.)
 * Shoda-san sent Enzo a document by Joris on the tuning of the LVDTs, so he stated working through it. He also researched the specifications of all the coils (PI and SF as well as BF.)
 * We found the damper magnets and the template for placing the magnets on the ring for the SF.
 * Hirata-san installed and wired up the PI yaw stepper. The vertical stepper still needs wiring, and the horizontal stepper wiring needs to be made vacuum-compatible.
 * We installed safety bars on the ±X side of the assembly frame about 3 m off the floor, so they are at waist height for a person standing on one of the tall ladders. The one on the +X side will be very good for safety where it is, but the one on the -X side will need re-doing: it is too close and not very securely attached because of interference from vacuum pump cabling.
 * We unlocked the inverted pendulum and experimented with adding weight. It was still stable with 4 layers of arc weights.
 * We also experimented with getting both the IP centered and the security structure vertical (so that the suspension hang centrally within it). We managed to get it all right with a combination of leveling the PI with the jacks and moving the IP with the fishing rods.
 * Adjusting the verticality of the SS had left the bottom of it off-center in the assembly frame, so we picked the entire system up with the crane and moved it in +Y and -X a few mm to re-center it.
 * We started to remove the PI so we could do various adjustments (check the SF LVDT, reconfigure the Cu damper, add the hex cable clamp on the rod and hang the magnet disk for the SF damper) but gave up when the PI-SF jammed in the SF.		 ==== 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.
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==== 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)