Unpacking the MagAO-X Electronics at LCO

This procedure describes how to unpack the MagAO-X electronics rack at LCO.

Estimated Time to Complete: 2 hrs

This document can be downloaded as a PDF: Electronics Rack Unpacking at LCO

Initial Conditions

  • Electronics rack box is unloaded at LCO

  • Cleanroom “unpacking room” is clear

Preparations

  • Obtain a ladder tall enough to reach the top of the (tilted) electronics box

  • Obtain 2 long ratchet straps to go around the box

  • Obtain 4x 1 m lifting straps

  • Assemble the T-shaped lifting fixture

  • Stage 8 shackles

Prepare Box For Unpacking

  • Deliver Electronics Box to the cleanroom unpacking area as shown. It can be brought all the way through the door using the forklift.

    ../_images/ebox_unpack_forklift_deliver.png

    Moving the box into the cleanroom

  • Remove the cover plates on the lifting points

    ../_images/ebox_unpack_delivered.png

    The electronics box staged in the cleanroom unpacking area. Note the covers are still on the lifting points

  • Reposition the Electronics Box using a pallet jack so that the lid/lifting-points are facing the outside garage door.

  • Wrap ratchet straps around the box to provide additional structural integrity, as shown below.

    ../_images/ebox_unpack_repos_ratchet.png

    Repositioned for lifting and ratchet straps installed.

Lift the Box

  • Attach 4x 1 m straps in double pass (to be 0.5 m) to the lifting points on the side, using the center of the lifting fixture. The straps will make a triangle on each side when the lift is complete.

    ../_images/ebox_unpack_Tfixture_rig.png

    Lifting fixture rigged to box lid.

  • Begin Lifting Box, moving the crane truck as it lifts so that it pivots to upright.

CAUTION: The box should not be lifted off the ground using the lifting rings, these are only for tilting the box while it is contact with the ground.

../_images/ebox_unpack_midlift.png

The electronics box being lifted. Note that as it is lifted the crane truck moves to the left.

  • Once it is fully upright, use a pallet jack to reposition the box to other end of room.

    ../_images/ebox_unpack_pjack_repos.png

    Using a pallet jack to reposition, moving the box to the right towards the outer garage door

  • Install the braces

    ../_images/ebox_unpack_braces.jpg

    Brace installed

  • Unbolt the top lid (still attached to crane) and remove it with the crane.

    ../_images/ebox_unpack_lid_removal.png

    Removing the lid

  • Remove foam from the top of the rack

  • Remove straps from the lid and place it out of the way

Remove the Rack

  • Attach the lifting fixture to the electronics rack lift points, so that the crane is supporting the rack. This is so that the rack can not tip out of the box on its own.

    ../_images/ebox_unpack_rack_attach.jpg

    Attaching the lifting fixture to the rack using double shackles

CAUTION: removing the side panel should only be done with the rack supported by the crane.

  • Remove all bolts on the side panel but two near the top.

  • With 2 workers holding the panel, remove the final two bolts. Place the panel out of the way.

  • Remove the foam and place it out of the way.

    ../_images/ebox_unpack_side_removed.png

    After the side is removed and the foam is removed.

  • After removing the foam on the side of the box, lift the rack out of the box and set it on its wheels.

CAUTION: at least 2 workers should be on hand to steady the box and guide the rack out.

../_images/ebox_unpack_removing_rack.png

The rack being removed from the box.

../_images/ebox_unpack_rack_removed.png

Setting the Rack down.

Stow the Box

  • Place foam back inside

  • Attach side panel, attach all bolts.

  • Attach lid using crane.

  • Tilt the box back down using the inverse of the above procedure. When empty, the ratchet straps do not need to be used.