Removing MagAO-X From The Telescope

This procedure describes how to remove the MagAO-X instrument on the Magellan Clay Telescope.

Estimate Time to Complete: 2 hours

This document can be dowloaded as pdf:

Telescope Removal Proecedure

Initial Conditions

  • [ ] Instrument on Magellan Clay Nasmyth Platform, operating.

Preparations

  • [ ] Shutdown MagAO-X

  • [ ] Turn off table legs and remove air connection

  • [ ] Remove all cables

    • See detailed procedure for removing 2K DM cables

  • [ ] Electronics Rack

    • [ ] Ensure that roll-out shelves are restrained

    • [ ] Close and lock doors

    • [ ] Tape keys down

  • [ ] Instrument

    • [ ] Remove eyepiece

    • [ ] Remove bumpers and pusher hardware

    • [ ] Turn off blower, and remove hose

    • [ ] Tape over any exposed holes (from cables, etc)

    • [ ] Secure any loose cables

    • [ ] Shrink wrap the instrument

    • [ ] Install solar blanked over shrink wrap

  • [ ] Cart and Rigging

    • [ ] Verify all cart hardware is in-hand

    • [ ] Verify two wire harnesses are in hand

    • [ ] Partially assemble cart, leaving one long side off

    • [ ] Store cart out of the way so table can roll into unpacking area

Rig Onto Cart

  • [ ] Position the telescope so that the elevator has access to the NASE platform

  • [ ] Lower table legs onto the casters by turning the 16 leveling bolts, and remove the metal pads

  • [ ] Roll the instrument away from the telescope NOTE: At least 4 people required, 2 to push, 2 to hold the cleanroom sides open

  • [ ] Move the cart, currently with 3 sides, around the legs

    • CAUTION: be careful to not bump the legs with the cart

  • [ ] Attach the 4th side of the cart

  • [ ] Ensure that the 8 large bolts on the cart are snug but not tight

  • [ ] Attach the lifting wire-harnass to each side of the cart

  • [ ] Attach the load spreader with straight extensions to the crane, using a crane scale

../_images/load_spreader_attach.jpg
The load spreader attached to the crane for lifting the cart

  • [ ] Place the load spreader in the center position (the cart is symmetric)

  • [ ] Lift the load spreader, and position it over the instrument

  • [ ] Being careful to not bump the instrument, lower the load spreader and attach the lifting harnass D rings. Use 2x shackles to extend the length to reach the cart on the floor.

../_images/cart_lift_extensions.jpg
Lifting harnasses attached with shackle extensions

  • [ ] Position a person at each corner of the cart

    CAUTION: Do not allow the cart to bump the legs or the table uncontrolled

  • [ ] Slowly lift the cart (320 lbs) until it is touching the bottom of the table

../_images/cart_lift_tofrom_table.jpg
The cart being lifted to the bottom of the table.

  • [ ] Install the 8 bolts attaching the cart to the table. Loosen bolts on the cart as needed.

  • [ ] Once the cart is bolted to the table bottom, while 320 lbs is still on the crane, tighten all cart bolts. Do not over-tighten, make 1/4 turn after the washers are no longer free. This is to avoid excessive stress on the table.

  • [ ] Install the triangle stabilizing ropes between the crane hook and the lifting fixture IAW the below figure. Tighten, but do not cause them to pick the load.

../_images/stabilizers.jpg
*The triangle stabilizing ropes should be tight, but not become the lifting point for the load.

CAUTION: be sure that the load spread does not hit the cart when being repositioned.

  • [ ] Reposition the load spreader center to the instrument + cart position marked on it.

  • [ ] Ensure that there is room to move the legs out from under the table, opening the garage door into the cleanroom if necessary.

  • [ ] Position a person at each corner of the cart to stabilize it during the lift.

  • [ ] Position two people to remove the legs from under the table

  • [ ] Lift the table off the legs. The weight of the table + cart is 1920 lbs

  • [ ] Move the legs out from under the table.

../_images/cart_lift_legs_ready.jpg
The cart and instrument ready to be set down on the wheels, with legs out of the way.

  • [ ] Set the cart down on its wheels.

  • [ ] Move MagAO-X onto the elevator, and remove from the dome

  • [ ] When cart is on concrete outside Clay, move very slowly to avoid excessive vibration

Transport MagAO-X To The Clean room

  • [ ] Ensure that the lift gate at the summit has been adjusted for slow smooth operation as is done for the asm

  • [ ] Push MagAO-X onto the lift-gate

  • [ ] Raise the lift-gate to the height of the flatbed truck

  • [ ] Move MagAO-X onto the truck, using the come-along

../_images/asm_backed_up.jpg
MagAO-X will be loaded at the telescope using the lift gate, adjusted for slow operation as it is for the ASM.

  • [ ] Secure the instrument by strapping the cart down at 4 points as illustrated in the below figure.

../_images/asm_truck_strapped.jpg
MagAO-X will be strapped to the Isuzu similarly to how the ASM is transported.

  • [ ] Slowly drive the truck to the cleanroom

  • [ ] Back the flatbed truck up to the lift gate.

  • [ ] Next, using the come-along, carefully move MagAO-X onto the lift gate.

  • [ ] If the legs were not moved, return to the with the flatbed and move the legs to the telescope.

Install MagAO-X On The Platform

Transport Electronics

  • [ ] remove the earthquake bar

  • [ ] Move the rack to the lift gate, and load it on the pickup.

  • [ ] place foam between the rack side and the truck to protect cable connectors

../_images/rack_connectors.jpg
The electronics rack has many delicate connectors on the side.

  • [ ] strap the rack securely to the truck

../_images/rack_truck.jpg
The rack on a truck for transport.

  • [ ] drive the truck to the cleanroom

  • [ ] unload the rack using the lift gate

Remove AOC from Control Room

  • [ ] power down AOC

  • [ ] remove monitors and pack

  • [ ] move AOC to cleanroom.