Differences between revisions 136 and 137
Revision 136 as of 2017-04-07 13:21:26
Size: 2491
Editor: MarkBarton
Comment:
Revision 137 as of 2017-04-14 13:36:43
Size: 2522
Editor: MarkBarton
Comment:
Deletions are marked like this. Additions are marked like this.
Line 8: Line 8:
 * We set things up again after the floor coating work.
 * We moved the PI into the second floor of the cleanbooth:
  * We cleared a path for the forklift (moving the portable cleanroom, worktable, power cables, vacuum pumps and other obstacles).
  * We got Saito-sensei to move the PI to the +Y side of the cleanbooth.
  * We washed and cling-wrapped a pallet.
  * We got Miyoki-san to disconnect the cables and curtain blocking the crane slot (and reconnect them afterwards).
  * We added some temporary crossbars in the top of the assembly frame and stored the SF cap on them to get it out of the way.
  * We craned in the pallet and set it up to bridge three floor joists.
  * We craned in the PI using Saito-san's adapter.
   * We couldn't find the original screws for the three PI transport plates so we substituted some others - fortunately there was no galling.
   * We had to connect the adapter to the crane with a sling because the ring for the hook was slightly too small).
 * We did a lot of cabling work:
  * We routed all the BF cables over the BF cap, up through the cable clamp on the SF-BF rod and up to the SF. (We had to redo a few because the Type 3 cable was at the flange end instead of the Type 1.)
  * We connected up the SF LVDT and FR stepper.
  * We started on rebalancing the BF (which had been perturbed by the weight and tension of all the cables). We got it rather better, but it needs more work.
  * We made another batch of anti-feedthrough adapters.

 * 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.
Line 28: Line 27:
Week of 4/10:
 * Hirata-san does scissor lift training 4/10.
 * Perry in Tokyo 4/10.
 * Debug/fix dead OSEM channel, TM-H4.
 * Debug BF/SF LVDTs.
 * Adjust BF pitch/roll.
 * Do TF from SF LVDT actuation.
Week of 4/17:
Line 39: Line 32:
 * Install pico drivers in rack, create MEDM interface (with Miyo-kun), and undo temporary connection of picos to old controller and joystick.
Week of 4/17:
Week of 4/24:

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, Perry, Hirata-san):

  • 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.

Plan for coming weeks

For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.

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.

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-07-29 13:18:56 by fabian.arellano)