- All the actuators have been removed and the actuator holes have been cleaned successfully with the exception of the one initially damaged during the Arcetri glycol incident which seems irrecoverable.
- The actuators have been cleaned with isopropyl alcohol (coil tip, board, spring contacts and DB-side contacts). The actuators have been visually inspected to select those with problems. Fifteen have issues, with six of them to be replaced by spares. The others will be repaired.
- The actuators have been cleaned with isopropyl alcohol (coil tip, board, spring contacts and DB-side contacts). The actuators have been visually inspected to select those with problems. Fifteen have issues, with six of them to be replaced by spares. The others will be repaired.
A rusted actuator tip. The rust can be easily removed in thickness by brushing the tip and no damage is shown on the copper (rust comes from magnets).
- Preparation is being made for the transportation of the recently aluminized thin shell #4 (TS4) from the Sunnyside Mirror Coating Lab to the mountain next week. The access road to the observatory will be graded just before the transportation to offer the shell a ride as smooth as possible.
- In parallel, work is done to accommodate TS4, which is not a real twin of the current shell.
A planning of the many steps to come will be available on June 17th.
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