Differences between revisions 148 and 189 (spanning 41 versions)
⇤ ← Revision 148 as of 2017-06-02 10:44:38 →
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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
Comment:
Deletions are marked like this. Additions are marked like this.
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At Kamioka (Mark, Fabian, Enzo, 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:
 * Enzo and Fabian routed all the SF/... cabling up past the SF and anchored it to the PI.
 * Enzo and Fabian moved the vacuum feedthroughs to new positions on the assembly frame corresponding more closely to the positions on the tank.
 * Hirata-san received the LBB blades back from additional machining, and he and Mark characterized them, and chose the 3 that were most closely matched. The total load capacity is 294 kg, which is rather larger than the 202 kg for the LBB and intermediate ring.
 * Mark measured all the coil resistances for the LVDTs and steppers on the PI to check everything was wired properly.
 * Hirata-san received the outrigger plates for the LBB black from additional machining to add helicoils but discovered that they were not M16 fine pitch but M16 regular. He sent them off again to be corrected.
 * Mark and Hirata-san inspected the vacuum tank and discovered that the top section is on backwards relative to the 3D CAD so that the jacks supporting the tank and the jacks supporting the PI via bellows are interchanged. We decided that, for the test hang, we would put the suspension in with a 135° anticlockwise rotation (instead of a 45° clockwise one). For the final hang, we will build the suspension with the BS/RM section backwards.
 * Fabian moved the F0 trim mass from on top of the F0 keystone and anchored it to the SF, keeping about 0.5 kg in reserve to allow for the weight of the SF-PI cables.
 * Enzo, Fabian and Hirata-san rearranged the in-air cabling for the OSEMs to match changes to the in-vacuum cables.		 ==== 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 6/6:
 * Cabling:
  * Finish moving in-air cabling to match feedthrough positions.
  * Cable and test PI vertical LVDT.
  * Calibrate PI vertical LVDT.
  * Set yoke on PI vertical LVDT (if necessary).
  * Cable and test PI yaw stepper.
  * Cable and test PI vertical stepper.
  * Cable and test PI horizontal steppers.
  * Cable and test PI horizontal LVDTs.
  * Calibrate PI horizontal LVDTs.

Week of 6/12:
 * Remove -Y flange cover.
 * Wipe LBB.
 * Loosen or remove LBB hold-down bolts.
 * Attach LBB outriggers and rod receptacles.
 * Remove port covers where feedthroughs will go.
 * Crane into tank.		 ==== 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)