The lid up operation took place on Jan. 22, 2021.
The system was not energized well ahead of time to allow to "warm up", as is usually done.
Starting Master Synchro value: 44
After gap set on all jacks, master synchro: 131
Notes on Jacks: Watch Jack 11, cause a few trips during lid down but was able to run again without jogging synchros
Jack 5 and 11 had spikes early but no trips
Jack 2 and 3 lagged early and caused trips (but no spikes)
After jogged 2 and 3 back, still had issues with 7,9,11
7, 9, 11 were jogged to match and then ran for half an inch, then 1, 5, 11 showed some spread
Lowered all the way down and spread was much improved (starting Master Synchro reading: 3)
Started raising again and went much smoother
Jacks 7 and 11 showed some occasional noise on readback
stopped to inspect vacuum seal (12:30 - Master Synchro 7016)
No trips on second attempt going up until 40"
Jack 1 kept falling behind, causing Jack 2 to trip
Finished at 2:03PM, Master Synchro at 47406
Meter stick did not reach ceiling (off by 1/4")
The meter stick versus limit switch discrepancy could be due to the stick shifting slightly by accident (due to vibrations or accidentally being bumped by someone). The limit switches were trusted as it would be highly unlikely for them to both disagree with the meter stick simultaneously if there was an adjustment setting issue with them. |