Differences between revisions 130 and 186 (spanning 56 versions)

Scraps of text for incorporation in the VIS Meeting Minutes

KAGRA/Subgroups/VIS/MeetingNAOJ

Type B (Mark)

Past week report

At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):

Plan for week of 9/4

Mark, Fabian, Enzo (Tue-Fri), Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun (Thu, Fri)

Retrieve PEEK piece from BF.
Crane SF back in.
Suspend BF/IRM/IM/RM/BS.
Test SF FR.
Calibrate SF LVDT.
Install SF cap; route cables.
Lift and weigh SF/BF/IRM/IM/RM/BS.
Adjust SF ballast.

Plan for week of 9/13

Mark (except Wed), Fabian (except ASJ), Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun

Prepare magnet ring.
Bring in PI.
Route cables.
Suspend SF/..., adjust tilt of SF and total mass.
Adjust damper gap.

Vacation Info

Mark: 10/16-24

KAGRA/Subgroups/VIS/TypeB/Minutes (last edited 2022-10-28 10:02:46 by fabian.arellano)

-  ⇤ ← Revision 130 as of 2017-03-10 13:40:53 → 
  Size: 1443
  Editor: MarkBarton
  Comment:
+   ← Revision 186 as of 2017-09-08 12:31:36 → ⇥
  Size: 929
  Editor: MarkBarton
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 7:
-At Kamioka (Mark, Fabian, Enzo, Perry, Hirata-san):
 * 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.
 
==== 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.
+At Kamioka (Mark, Ohishi-san, Fabian, Enzo, Hirata-san, Yoshioka-kun, Kozu-kun):
 * 
==== Plan for week of 9/4 ====
Mark, Fabian, Enzo (Tue-Fri), Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun (Thu, Fri)
 * Retrieve PEEK piece from BF.
 * Crane SF back in.
 * Suspend BF/IRM/IM/RM/BS.
 * Test SF FR.
 * Calibrate SF LVDT.
 * Install SF cap; route cables.
 * Lift and weigh SF/BF/IRM/IM/RM/BS.
 * Adjust SF ballast.

==== Plan for week of 9/13 ====
Mark (except Wed), Fabian (except ASJ), Enzo, Ohishi-san, Hirata-san, Yoshioka-kun (Tue, Wed, Fri), Kozu-kun
 * Prepare magnet ring.
 * Bring in PI.
 * Route cables.
 * Suspend SF/..., adjust tilt of SF and total mass.
 * Adjust damper gap.
  

==== Vacation Info ====
Mark: 10/16-24