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| * Type B Past Week Summary * Fabian, Mark, Yokogawa-kun and Kuwahara-kun did BS installation at Kamioka: * Calculated BS pitch correction ([[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=5630|JGW-T1605630]]) * Hung dummy optic and set pitch. * Prepared RM for hanging (adding OSEMs etc). One OSEM (#24) had wobbly leads and was brought back to Mitaka for rework. * Placed vacuum feedthroughs on assembly frame and cleaned initial batch (4) of D-Sub cables. * Decided position of BS rack with Miyakawa-san. * Measured various maraging rods and the rod holders on the SF. * Placed safety rails, rearranged floor panels, cleaned new floor panels, and otherwise improved safety. * Hirata-san: * Made new 3D models of the maraging rods for PRx and SRx * Made new collet design for PRx and SRx (3D and 2D). * Made new IM flag design for PRx and SRx (3D and 2D). * Washed lots of Type A BF parts and OSEM parts. * Cleaned the BS BF-IM maraging rod and organized the rest of the stock of rods. * Measured some BF part dimensions. * Pre-assembled parts for BFs. * Type B ongoing issues * Longer term to-do list * Do Inventor assembly for SR2 in chamber and on assembly frame (Hirata) - NEARLY DONE. * 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) * 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) |
* Hirata-san: * Made BS disposable wire clamp 3Dmodel and drawings. * Made ballast mass drawings for BS Bottomfilter and Standardfilter. * Made parts list and screw list for disposable wire clamp and ballast mass. * Sent drawings and lists to i-ject for quotation. * Start to make drawings for SR big parts (optical bench,damper rings,sus wires,cable clamps) - ongoing. * Mark, Fabian and Enzo (at Kamioka): * Realized that some of the imbalance in the BF was from the fishing rod and calculated a new set of blade offsets to center the rod but leave the torque from the FR to be cancelled by the trim mass for now. * Applied the blade offsets and checked that the BF hung as expected. * Found that the yoke was rubbing again and corrected it by putting it at an angle matching the keystone. * Found that the cables were adding too much stiffness and friction and rerouted them. * Found that the GAS was unstable and reduced the compression symmetrically to get 0.37 Hz. * Rebalanced the IM to set the right pitch, yaw and height. * Tested the IM picos. Unfortunately the pitch pico stuck near or at one end of its range and we will need to take the end plate off the IM to find out what is wrong. |
Scraps of text for incorporation in the VIS Meeting Minutes
KAGRA/Subgroups/VIS/MeetingNAOJ
- Hirata-san:
- Made BS disposable wire clamp 3Dmodel and drawings.
- Made ballast mass drawings for BS Bottomfilter and Standardfilter.
- Made parts list and screw list for disposable wire clamp and ballast mass.
- Sent drawings and lists to i-ject for quotation.
- Start to make drawings for SR big parts (optical bench,damper rings,sus wires,cable clamps) - ongoing.
- Mark, Fabian and Enzo (at Kamioka):
- Realized that some of the imbalance in the BF was from the fishing rod and calculated a new set of blade offsets to center the rod but leave the torque from the FR to be cancelled by the trim mass for now.
- Applied the blade offsets and checked that the BF hung as expected.
- Found that the yoke was rubbing again and corrected it by putting it at an angle matching the keystone.
- Found that the cables were adding too much stiffness and friction and rerouted them.
- Found that the GAS was unstable and reduced the compression symmetrically to get 0.37 Hz.
- Rebalanced the IM to set the right pitch, yaw and height.
- Tested the IM picos. Unfortunately the pitch pico stuck near or at one end of its range and we will need to take the end plate off the IM to find out what is wrong.