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| * Type B Past Week Summary * Akutsu-san provided a set of cleanroom gear (shoes only slightly too tight!) for use by Mark this week. And Sakamoto-san sent another set from Kamioka to Kashiwa. * Fabian did a fit test of the winches onto the IM. * The RM, IM and IRM were weighed, and wrapped/packed for shipment to Kamioka. * Mark made a checklist of all the parts of the BS mirror box and gluing jig, to help with collecting the parts from Kashiwa. * Fabian designed an extra 600 g of trim masses for the IM and Hirata-san made drawings and ordered them. The design allows for the masses to be added to the IM even after it has been placed in the assembly frame and the dummy optic and RM have been hung, so it should not delay work. * Mark worked on the schedule, making the next few weeks more realistic and incorporating the new plan for the SR RMs (the test will be used for SR2 but two more will be made from scratch next financial year). * Fabian worked on the payload assembly procedure. * Hirata-san washed 7 OSEMs for Akutsu-san, and various other parts for Yamamoto-san of ICRR. * Hirata-san removed the remaining glue from the BS primary and secondary prisms, as well as the prisms removed from the PR hanging test mirror. (The small sapphire prisms for the PR were not intended to be reused and one had already broken at Kashiwa, but the metal PR secondaries can and will be used again.) |
=== 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. |
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| * Type B ongoing issues * OSEMs * Akutsu-san is working to get wide-mouth OSEMs ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=1853|2 assembled]]; another few were assembled and a batch of 7 were washed. * Longer cables for BF->PI and SF->PI. * Connectors RECEIVED, cables being made. * Lower breadboard stuff * Installation to be incorporated into the procedure document. Mark/Takahashi to discuss. * Documents * 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]] * To-do list during Mark's vacation * Weigh IM/RM/IRM (Fabian, Hirata) - NEW TRIM MASS ORDERED. * Pack/ship IM/RM/IRM to Kamioka (Hirata/Fabian) - READY TO SHIP. * Analyze geophone data (Fabian/Shoda) - DONE. * Remove glue from dummy BS face (Fabian) - MOSTLY DONE. * Reglue flags and prisms (Tatsumi, Fabian) - from Friday 8/5. * Clean wire for BS and RM (Hirata) - DONE * Get new winch parts for new wire diameters - design received from Ikenoue-san * Do fit/function test of winches (Fabian/Hirata) - DONE * Ship winches to Kamioka (Hirata/Fabian) * Work on BS simulation (Fabian) * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - ONGOING. * Write more of payload assembly procedure (Fabian) * Write more of main assembly procedure (Mark) * Longer term to-do list * Do BS Simulink model (Mark, Kokeyama) * 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) |
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.