TABLE TOP ASSEMBLY

Prerequisites

Figure 1. DO NOT TAKE THE TABLE BEYOND THE MARKED LINE

Procedure

  1. Turn the system power ON. Refer to Lockout / Tagout for System Cabinet PDU Main Breaker.
  2. Disconnect the Table from MR Magnet; take it out from the Magnet room. Refer to TAKE TABLE OUT FROM THE MAGNET ROOM
  3. Remove the scissor covers from the table. SCISSOR COVERS
  4. Remove the Cradle from the Table. Refer to Posterior Array Coil Replacement with removing Fixed Table.
  5. Remove the Support block fixed to the tabletop for the cables.

    Figure 2. Support block

  6. Remove the Cable tract connecting screw to the table top.

    Figure 3. screw

  7. Remove the cable cramp and track and remove cables.

    Figure 4. Cable cramp and track

  8. Remove the Cable assemblies along with the cable tract from the Tabletop.

    Figure 5. Cable assemblies

  9. Remove the Table Top RH Panel fixing screws in the Table.

    Figure 6. Table Top RH Panel fixing screws

  10. Bent down the right panel slightly. Do not apply any pressure which bents down the Panel.

    Figure 7. Bent down the right panel slightly

  11. Remove the cables connected to the Limit switch of the home sensor.

    Figure 8. Remove the cables

  12. Remove the Home sensor Cable assembly from the Tabletop.

    Figure 9. Home sensor Cable assembly

  13. Loosen the Up LS actuator lock nut with the help of 7/16 spanner.

    Figure 10. Loosen the Up LS actuator lock nut

  14. Remove the Up LS actuator Locknut and the Up LS Actuator.

    Figure 11. Locknut and the Up LS Actuator

  15. Assemble lock screw rod to lock position of scissor.

    Figure 12. Assemble lock screw rod

  16. Remove 4 screws of actuator mounting bracket.

    Figure 13. 4 screws

  17. Remove circlips & pin.

    Figure 14. Remove circlips & pin

    Figure 15. Remove actuator

  18. Remove the circlips of the both Pivot shafts.

    Figure 16. Circlips of the both Pivot shafts.

    19. Notice Image
    • notice
    • When the pivot shaft can not be taken out. then one person can take the table a little up, and the other one take the pivot shaft out.
  19. Remove the Pivot shaft, connecting tabletop and scissors. Hold the Rollers placed on both the sides thicker scissor in one hand while removing the Pivot shaft.

    Figure 17. Pivot shaft

  20. Hold the scissor bush placed in between scissors in one hand and remove the Pivot shaft.

    Figure 18. Remove the Pivot shaft

  21. Now the Table top is free in the Table. Lift the Table Top from the Base assembly.

    Figure 19. Lift the Table Top

  22. Now slide down the New Table top on the Delrin guides of the Front and Rear Plate.

    Figure 20. New Table top

  23. Move the Table top on either side and adjust such a way that the Pivot shaft Hole of Table top will align with the scissor hole.

    Figure 21. Move the Table top

    24. Notice Image
    • notice
    • When it's difficult to align with the scissor and table top. then one person can take the table a little up, and the other one insert the pivot shaft.
  24. Insert the Pivot shaft, connecting tabletop and scissors. Hold the Rollers placed on both the sides thicker scissor in one hand while inserting the Pivot shaft.

    Figure 22. Insert the Pivot shaft

  25. Hold the scissor bush placed in between scissors in one hand and insert the Pivot shaft.

    Figure 23. Insert the Pivot shaft.

  26. Insert the circlips of the both Pivot shafts.

    Figure 24. insert the circlips

  27. Rotate the Lock screw with the help of spanner (14mm) and align the Actuator bearing to tabletop assembly.

    Figure 25. Align the Actuator bearing

  28. Insert the connecting shaft to the Tabletop connecting the actuator assembly.

    Figure 26. Insert the connecting shaft

  29. Assemble pin & circlip for new actuator. In this case, actuator mounting bracket holes will not be aligned with tapped hole in lower base of table.

    Figure 27. Assemble pin & circlip for new actuator

    Figure 28. Placing Actuator

    30. Notice Image
    • notice
    • FE can't Rotate lock screw rod to move tabletop up.
  30. Rotate lock screw rod to move tabletop down and align screw mounting holes.

    Figure 29. Rotate lock screw rod to move tabletop down

  31. Assemble actuator mounting screws and tighten.

    Figure 30. Assemble actuator mounting screws

  32. Remove lock screw rod.

    Figure 31. Remove the Lock screw

  33. Fix the Up LS Actuator to the table top. And then the Lock nut to the Up LS actuator.

    Figure 32. Up LS Actuator

  34. Ensure the orientation of the Up Ls actuator such a way that it actuates the limit switch when the table is taken to top most condition.

    Figure 33. Up LS actuator

  35. Tighten the Lock nut of the Up LS Actuator.

    Figure 34. Lock nut

  36. Remove the screws marked of the RH Table Top Panel and pull down the panel.

    Figure 35. RH Table Top Panel

  37. Rout the Home sensor cable in the table top.

    Figure 36. Rout the Home sensor cable

  38. Connect the Home sensor cable to the Home sensor.

    Figure 37. Connect the Home sensor cable

  39. Fix the RH Table top panel back to the table and tighten the screws.

    Figure 38. Fix the RH Table top panel

  40. Insert the PA coil coaxial and DC cable Assembly from the top of the Tabletop.

    Figure 39.

  41. Fix the Cable track of the PA coil coaxial and DC cable Assembly to the Tabletop.

    Figure 40. Fix the Cable track

  42. Fix the support block to the Table top.

    Figure 41. support block

  43. Rout the cables in the table and wind the spiral tube around all Assemblies.

    Figure 42. Rout the cables in the table

  44. Assemble the cradle to the table.
  45. Connect the cables of the table.
  46. Level the table.
  47. Dock centering and Height adjustments.
  48. Fix the scissor covers from the table.
  49. Fix the FRP Covers of the Table.