Differences between revisions 152 and 163 (spanning 11 versions)
⇤ ← Revision 152 as of 2017-06-02 13:27:13 →
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Editor: MarkBarton
Comment:
← Revision 163 as of 2017-07-07 09:59:19 → ⇥
Size: 3066
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 (Enzo):
 * Enzo (with help from Miyo-kun) fixed the broken actuation coil on PI LVDT #0.
 * Enzo worked on the final cabling plan for BS and SRx.
 * Enzo replaced the LVDT driver again to have one with no dead channels (and free up the partly non-working cards for servicing).
Line 9: Line 12:
 * 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.
 * Hirata-san assembled the rods for the LBB and LBB damper.
 * Mark released new editions of E1503600 (BS circuit diagram) and E1503901 (in-vacuum cable detail) and updated Sato-san's cable spreadsheet.		 At Mitaka and Kashiwa (Mark, Hirata-san, Fabian, Enzo):
 * We glued magnets into their holders.
 * We did a walk-through of the gluing procedure at Mitaka and discovered that the secondary prisms were missing.
 * We took the mirror box and gluing tools to Kashiwa to do as much of the gluing as possible.
 * Hirose-san applied First Contact to the BS and he and Kieran moved it into the mirror box.
 * We practiced putting sapphire prisms on the BS but didn't apply glue.
 * We tried the magnet gluing jigs designed by Aso-san and found two major issues: the overall length was about 25 mm too long, and there was no adjustment to allow for the wedge.
 * We designed a simple modification to the jigs that hopefully would be trivial for the ATC to do: the jigs will be cut in half and the bottom section will be mounted with adhesive on an 11 mm rod that slides in the central hole of the top section. Thus the top half can be screwed into the existing recess, and the bottom half with the magnets and glue can be allowed to drop about 3 mm onto the face of the optic. Hirata-san worked with ATC to get this done and it should be ready today (Friday 7/7).
 * Hirata-san also got ATC to make some jigs to hold the old 5-mm prisms so that they can be ground down to 3 mm to replace the missing ones. Hirata-san will do the grinding himself today (Friday 7/7/).
 * We decided to continue the gluing work at Kamioka, so we brought the BS back to Mitaka and will ship it on to Kamioka next Tuesday.
 * Hirata-san did a version of the 3D CAD with the as-built BS Test Hang configuration.
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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, replace with cloth cover (or foil).
 * Prepare LBB.
  * Wipe LBB.
  * Loosen or remove LBB hold-down bolts.
  * Attach LBB outriggers and rod receptacles.
  * Lay out slings for LBB damper rings.
 * Prepare LBB damper support.
  * Install rods for LBB magnet ring.
  * Install safety rods for LBB Cu ring.
 * Prepare LBB Cu ring.
  * Pass into tank.
  * Reassemble on top of slings.
  * Lay down spacers to protect magnets (in next step).
 * Prepare LBB magnet ring.
  * Assemble temporarily.
  * Attach magnets with template.
  * Disassemble.
  * Pass into tank.
  * Reassemble on top of Cu ring.
 * Install LBB damper.
  * Pass sling ends through loops to bind LBB damper rings.
  * Remove vacuum tank lid and ring.
  * Crane rings up to install height, hook LBB magnet ring and support LBB Cu ring by TBD method.
 * Crane suspension into tank.
 * Hook LBB.
 * Crane vacuum tank lid+ring black on.
 * Remove vacuum tank lid (only).
 * Remove port covers where feedthroughs will go, move feedthroughs from assembly frame and install on vacuum tank ring.
 * Cabling, cabling, cabling.		 ==== Plan for weeks of 7/10, 7/17 ====
Mark, Enzo mostly at Kamioka.
 * More TFs.
 * Receive BS at Kamioka, do gluing if possible.
 * Learn how Miyo-kun's pico driver software works and make fixes/improvements.
 * Test picos and steppers more fully.
 * Finish tidying rack and labeling cables.
 
  
Fabian, Hirata-san at Mitaka.
 * Do new 3D CAD (Hirata-san):
  * SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Fabian/Mark to do.)
  * Final BS build, SS/PI/SF as for Test Hang but with BF/IRM/IM/BS/RM down rotated back to original direction.
   * On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
   * In-tank version.
 * Solve arc weight versus magic wand problem.
 * Do mass budget for LBB - design ballast masses (Fabian)
 * Run TFs, make improvements to real-time model (Mark, Enzo).
 * Design SR assembly frame.
 * Inventory for SR.
==== Plan for week of 7/10 ====
Mark and Enzo at Kamioka:
Fabian and Hirata-san at Mitaka.

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Enzo):

  • Enzo (with help from Miyo-kun) fixed the broken actuation coil on PI LVDT #0.
  • Enzo worked on the final cabling plan for BS and SRx.
  • Enzo replaced the LVDT driver again to have one with no dead channels (and free up the partly non-working cards for servicing).

At Mitaka and Kashiwa (Mark, Hirata-san, Fabian, Enzo):

  • We glued magnets into their holders.
  • We did a walk-through of the gluing procedure at Mitaka and discovered that the secondary prisms were missing.
  • We took the mirror box and gluing tools to Kashiwa to do as much of the gluing as possible.
  • Hirose-san applied First Contact to the BS and he and Kieran moved it into the mirror box.
  • We practiced putting sapphire prisms on the BS but didn't apply glue.
  • We tried the magnet gluing jigs designed by Aso-san and found two major issues: the overall length was about 25 mm too long, and there was no adjustment to allow for the wedge.
  • We designed a simple modification to the jigs that hopefully would be trivial for the ATC to do: the jigs will be cut in half and the bottom section will be mounted with adhesive on an 11 mm rod that slides in the central hole of the top section. Thus the top half can be screwed into the existing recess, and the bottom half with the magnets and glue can be allowed to drop about 3 mm onto the face of the optic. Hirata-san worked with ATC to get this done and it should be ready today (Friday 7/7).
  • Hirata-san also got ATC to make some jigs to hold the old 5-mm prisms so that they can be ground down to 3 mm to replace the missing ones. Hirata-san will do the grinding himself today (Friday 7/7/).
  • We decided to continue the gluing work at Kamioka, so we brought the BS back to Mitaka and will ship it on to Kamioka next Tuesday.
  • Hirata-san did a version of the 3D CAD with the as-built BS Test Hang configuration.

Plan for weeks of 7/10, 7/17

Mark, Enzo mostly at Kamioka.

  • More TFs.
  • Receive BS at Kamioka, do gluing if possible.
  • Learn how Miyo-kun's pico driver software works and make fixes/improvements.
  • Test picos and steppers more fully.
  • Finish tidying rack and labeling cables.

Fabian, Hirata-san at Mitaka.

  • Do new 3D CAD (Hirata-san):
    • SR2 on BS assembly frame. (Adjust jack positions if possible, or leave for Fabian/Mark to do.)
    • Final BS build, SS/PI/SF as for Test Hang but with BF/IRM/IM/BS/RM down rotated back to original direction.
      • On-assembly-frame version. (Adjust jack positions if possible, or leave for Mark to do.)
      • In-tank version.
  • Solve arc weight versus magic wand problem.
  • Do mass budget for LBB - design ballast masses (Fabian)
  • Run TFs, make improvements to real-time model (Mark, Enzo).
  • Design SR assembly frame.
  • Inventory for SR.

Plan for week of 7/10

Mark and Enzo at Kamioka: Fabian and Hirata-san at Mitaka.

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