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| * Type B Past Week Summary * Fabian, Mark and Liu-kun did BS installation at Kamioka: * They replaced the thrust bearing in the BF with a stainless version. While replacing the picomotor spring, they found several issues with screws. * They removed the sheet metal cable clamp on the bottom of the BF and installed a redesigned one. * They installed the "flying saucer" cable clamp on the maraging rod between the IM and BF, and attached the cables. There was an issue with the cables from the bottom OSEMs, which are too short by about 300 mm. * They suspended the IM. Relative to the mass budget, about 700 g of trim mass had to be taken off to get good balance. There was also a problem with rubbing. It turned out that the keystone and the attached central PEEK coil former for the LVDT were at an angle, and the inside of the coil former was fouling on the outside of the pole piece for the magnets. It's not yet clear why the keystone was misaligned. * Hirata-san: * Made drawings of (revised) stub flag gluing jigs. * Worked on BS full-assembly drawings for Saito-sensei. * (For other groups) * Made a 3D model of maraging wires. * Finished making drawings of PRM inner frame. * Worked on re-setting up PC after crash. * Longer term to-do list * Do Inventor assembly for SRx in chamber and on assembly frame (Hirata) - SR2/SR3 DONE, SRM ongoing. * Part "disk security" top has to be modified - screw positions do not match. * Write more of payload assembly procedure (Fabian) - ONGOING * Write more of BS Assembly Procedure [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4235| E1504235]], [[https://onedrive.live.com/redir?resid=D5CCFA70A378E0D0!195&authkey=!AM_usynuo9QI57g&ithint=folder,webloc|E1504235 draft]] (Mark) - ONGOING * Lower breadboard installation to be incorporated into the procedure document. * Work on BS simulation (Fabian) * Do BS Simulink model (Mark, Kokeyama) - TM/IM/BF level DONE * Do 2D drawings of SR2 parts (Hirata) * Redesign SRx IM wire clamps for larger prisms, remachined RMs * Order SRM/PRM parts (Hirata/Shoda) * Order SRx fasteners (Hirata) |
=== Type B (Mark) === ==== Past week report ==== At Kamioka (Mark, Fabian, Enzo, Hirata-san): * We improvised a solution for ballast mass on the BF, using some heavy dog clamps meant for pedestals, washed and wrapped in foil. We we use them for the duration of the BS Test Hang and then swap them out for custom masses. * We rearranged the BS rack, closing the gaps between boxes (per request of Miyakawa-san. We also renumbered some boxes, connectors and cables so as to use zero-based numbering (#0, #1, #2,...) throughout. * We routed the OSEM cables into the external cable rack (rather than through the PR2 area). * We connected up the BF LVDT, and BF fishing rod stepper motor. * We installed a signal generator for the LVDT. * We connected the super motor driver box to the Internet and attempted to set it up, but with no success so far. * We found the final picomotor driver (we have been using the one from TAMA in the clean booth). * We found many items that we will need soon, including the copper ring for the SF. * We found issues with the digital system (the computer driving the rack had been changed from k1pr2 to k1bs, which causes problems) and worked with DGS to fix them. It now mostly works but the real-time model crashes from time to time. |
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| ==== Plan for coming weeks ==== * Everyone (Mark, Fabian, Enzo, Hirata-san) next week at Kamioka |
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):
- We improvised a solution for ballast mass on the BF, using some heavy dog clamps meant for pedestals, washed and wrapped in foil. We we use them for the duration of the BS Test Hang and then swap them out for custom masses.
- We rearranged the BS rack, closing the gaps between boxes (per request of Miyakawa-san. We also renumbered some boxes, connectors and cables so as to use zero-based numbering (#0, #1, #2,...) throughout.
- We routed the OSEM cables into the external cable rack (rather than through the PR2 area).
- We connected up the BF LVDT, and BF fishing rod stepper motor.
- We installed a signal generator for the LVDT.
- We connected the super motor driver box to the Internet and attempted to set it up, but with no success so far.
- We found the final picomotor driver (we have been using the one from TAMA in the clean booth).
- We found many items that we will need soon, including the copper ring for the SF.
- We found issues with the digital system (the computer driving the rack had been changed from k1pr2 to k1bs, which causes problems) and worked with DGS to fix them. It now mostly works but the real-time model crashes from time to time.
Plan for coming weeks
- Everyone (Mark, Fabian, Enzo, Hirata-san) next week at Kamioka