Removing MagAO-X from the Telescope =================================== This procedure describes how to remove the MagAO-X instrument on the Magellan Clay Telescope. Estimated Time to Complete: 2 hours This document can be downloaded as a PDF: :static:`Removing MagAO-X from the Telescope ` Initial Conditions ------------------ - Instrument on Magellan Clay Nasmyth Platform, operating. Shutdown ------------ - At the end of the last night, have the TO position the telescope so that the NASE platform faces the elevator. - Power down all of MagAO-X - Ensure that `stagepickoff` in the `out` position. - Place the k-mirror at 0 degrees. - Select the Ha-narrow and CH4-875 filters on fwsci1/2 - turn off power for all devices on MagAO-X following the regular shutdown procedure. - use the `shutdown -h now` command to halt both RTC and ICC - once the computers are off, turn off all things in the rack. - Remove blower hose and cover the hole. - 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 - Remove air connection - 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 Rig Onto Cart ------------- - Lower table legs onto the casters by turning the 16 leveling bolts, and remove the metal pads - Roll the instrument away from the telescope - Assemble the cart around the instrument - **CAUTION:** be careful to not bump the legs with the cart - Ensure that the 8 large bolts on the cart are snug but not tight - Attach the lifting wire-harness to each side of the cart - Attach the load spreader with straight extensions to the crane, using a crane scale .. image:: figures/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 harness D rings. Use 3x shackles to extend the length to reach the cart on the floor. .. image:: figures/cart_lift_extensions.jpg *Lifting harnesses 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 .. image:: figures/cart_lift_tofrom_table.jpg *The cart being lifted to the bottom of the table.* - Install the 4 bolts attaching the cart to the table. Use only the 4 outboard bolts. Loosen bolts on the cart as needed to adjust. - 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 - Reposition the load spreader center to the instrument + cart position marked on it. the lifting fixture IAW the below figure. Tighten, but do not cause them to pick the load. .. image:: figures/stabilizers.jpg *The triangle stabilizing ropes should be tight, but not become the lifting point for the load.* - Ensure that there is room to move the legs out from under the table towards the telescope. - Position a person at each end 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. - Move the legs out from under the table. .. image:: figures/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 .. image:: figures/inst_backed_up.jpg *MagAO-X is loaded at the telescope using the lift gate, adjusted for slow operation.* - Secure the instrument by strapping the cart down at 4 points as illustrated in the below figure. .. image:: figures/inst_on_truck.jpg *MagAO-X will be strapped to the Isuzu.* - 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. - Return to the top with the flatbed and move the legs to the cleanroom. - Placed on 2 dollies as in the below image. .. image:: figures/legs_dollies.png *Legs on 2 dollies placed in the middle of the table under each lower long tie bar (away from basket).* - Move the legs to the flatbed and strap them down. .. image:: figures/legs_truck.png *Legs strapped to the truck.* 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 .. image:: figures/rack_connectors.jpg *The electronics rack has many delicate connectors on the side.* - strap the rack securely to the truck .. image:: figures/electronics_pickup.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.