Differences between revisions 137 and 151 (spanning 14 versions)
⇤ ← Revision 137 as of 2017-04-14 13:36:43 →
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Editor: MarkBarton
Comment:
← Revision 151 as of 2017-06-02 13:25:28 → ⇥
Size: 3499
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 7: Line 7:
At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san): At Kamioka (Mark, Fabian, Enzo, Hirata-san):
Line 9: Line 9:
 * Filed crane adapter ring to make it fit better on the hook.
 * Debugged the BF and SF LVDTs (the signal generator had lost its settings in the rack shutdown).
 * Debugged the TM-H4 OSEM problem (a "Type 3 extension cable had gone bad).
 * Weighed eyebolts used to lie the SF.
 * Shipped the old pico driver and joystick back to Mitaka for Eleonora.
 * Borrowed a second pico driver ("PR3") and set it and "BS" up in the rack.
 * Practiced driving the BF cap picos with the new drivers.
 * (With help from Miyo-kun) got the pico MEDM screens running.
 * Replace the temporary "PR3" driver with a new one "BS_BF", and renamed "BS" to "BS_IM".
 * Checked all the DIO connections to the LPCD and connected up the HPCDs. With help from Kokeyama-san we can now see all the drivers from EPICS.
 * Worked on balancing the BF/IRM/IM... section. Sometime during this work, the IM sank and would not come back to its proper position even with the fishing rod. We put a scale under the RM and found that the imbalance was 488 g. Using the fishing rod we got this down to 235 g, but we found that the direction of the stepper was not consistently related to the direction selected on the driver screen - we had previously noted that "left" was "up, but driving "up" the imbalance would decrease to 235 g and then start increasing again, indicating the stepper had bounced off some obstacle. (There was no obvious sound when this happened, unlike at the low end.)
 * We decided to give up on tuning the height of the IM with the fishing rod and to proceed with the test hang by locking the BF keystone at the desired height.
 * Hirata-san installed the PI fishing rod and magic wand, and did more work on changing the PI LVDT connectors from female to male.
 * Enzo made many edits to the circuit diagram, adding the DIO for the HPCDs and correcting minor mistakes.		  * 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.
Line 27: Line 22:
Week of 4/17:
 * 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.
Week of 4/24:
 * Crane in PI.
 * Connect SF/BF... section.
 * Temporarily remove PI and adjust SF ballast if necessary.
 		 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.

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, Hirata-san):

  • 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.

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.

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