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| * We removed the BF cap to debug the stepper motor. We checked the cabling but didn't find a problem. Eventually toggling the power to the driver box seemed to fix it. * We got the wheels removed from the two tall stepladders. * We started to rebalance the IM but came to realize that it was unstable for more than trivial pitch and roll (and had been for some time). We moved trim mass from top to bottom and it became unconditionally stable. * We rebalance the IM, put back the IRM and adjusted the OSEMs. * We took a successful TF in IM-L. * We added the security structure ring for below the SF and then added the SF. We noticed the cap is on at the wrong angle (so the keystone lock screws are inaccessible) but we can easily fix that. |
* 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. ==== Plan for coming weeks ==== For more detail, see [[KAGRA/Subgroups/VIS/TypeB/ToDo]]. 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. * 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. * 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: * Crane in PI. * Connect SF/BF... section. * Temporarily remove PI and adjust SF ballast if necessary. |
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| ==== Plan for coming weeks ==== Next week: * Everyone (Mark, Fabian, Enzo, Perry Hirata-san) at Kamioka, Monday-Friday except for Hirata-san Wednesday-Friday). * Finish SF installation. * Finish BF cabling, hang BF/IRM/IM/RM/BS from SF and confirm weight matches load capacity. * Re-trim BF as necessary. * Get picomotor driver working. Week after next: * Everyone (Mark, Fabian, Enzo, Hirata-san) at Kamioka, Monday-Friday. * Prepare for PI installation. |
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):
- 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.
Plan for coming weeks
For more detail, see KAGRA/Subgroups/VIS/TypeB/ToDo.
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.
- 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.
- 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:
- Crane in PI.
- Connect SF/BF... section.
- Temporarily remove PI and adjust SF ballast if necessary.