• Topic ID: id_18718303
  • Version: 1.1
  • Date: Aug 18, 2020 3:36:18 AM

Longitudinal Encoder Replacement (Cradle Location)

Prerequisites

Overview

Procedure Effectivity:

Procedure

  1. Raise the table to maximum height.
  2. Remove right Gantry Side Cover.
    • warning
    • POTENTIAL FOR SHOCK.
    • VOLTAGE MAY BE PRESENT.
    • USE PROPER LOCKOUT/TAGOUT PROCEDURES BEFORE REPLACING COMPONENTS.
    Notice Image
    • notice
    • Always turn OFF the HVDC before the 120 VAC. Turning OFF 120 VAC power before HVDC power can result in equipment damage.
  3. Remove power from table by turning off 120VAC, Axial Drive and HVDC switches on Service Switch Panel.
  4. Remove the right Side Rail Cover and the Cradle Assembly.
  5. Remove the Tie-Wraps on the Encoder Cable, and disconnect the Cradle Encoder Cable, located under the right Side Rail of the Table.
  6. Remove two screws in the Cradle Encoder Cover.
  7. Remove the screw connecting the wires between the Cradle Glider and the Encoder.
  8. Remove the two screws in the mounting bracket of the Mounting Bracket of the Cradle Encoder.
  9. Install the new Cradle Encoder with the two screws.
  10. Connect the wires between the Cradle Glider and the Encoder.
  11. Connect the Cradle Encoder Table, and Tie-Wrap any loose cabling.
  12. Install the Cradle Encoder Cover and the Cradle Assembly.

Finalization

  1. Notice Image
    • notice
    • Always turn ON the 120 VAC before the HVDC. Turning ON HVDC power before 120 VAC power can result in equipment damage.
  2. Power up the Table from the Service Switch Panel.
  3. Follow the procedure on Table Characterization to Characterize the Table Longitudinal Position.
  4. Using the service switches on the MTCB, move the Table up and down, and the Cradle in and out.
  5. Use the gantry control keys to move the Table up and down, and the Cradle in and out.
  6. When the Table functions properly, reinstall the Table Base Covers, the Side Panels and the Gantry Side Cover.