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| * Type B Past Week Summary * Mark and Hirata-san at Mitaka * Gathered parts for cable making. * Mark and Hirata-san at Kamioka: * Replaced the floor panels that had been taken from the PR2 area (filling in the hole in the floor) and found/installed two new panels to act as bridges near the BS assembly frame. * Installed two more LPCDs and the stepper motor driver in the PR2 rack. * Ran cables from the rack to the second and third sat amps (for the IRM OSEMs). * Added a second DIO card in the rack and connected it to the BIO inputs and outputs of the new LPCDs. * Started making extension cables for RM-H2 and -H3 OSEMs but gave up due to complicated grounding arrangement. * Washed four 40-cm D-Sub-9 ribbon cables to use as temporary extensions (maybe also for H1/H4). * Added extension to the IM pico cable for the BF yaw pico. * Made LVDT adapter cable. * Mark worked on schedule. |
* 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.