• Topic ID: id_18718302
  • Version: 1.1
  • Date: Aug 18, 2020 3:34:49 AM

Home Position Switch Replacement

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 Table Side Rail Covers and Cradle Drive Cover, to access the Cal Pin.
  5. Install and tighten the Cal pin to about one-half inch from the home position, to hold the carriage in place.
    note:

    Pay attention to the location of the wires on the defective switch, before you remove them. Restore the wires to their original configuration on the replacement switch.

  6. Disconnect the wires from the Home Position switch terminals.
  7. Remove the nut that fastens the switch in place.
  8. Remove the defective switch from its bracket.
  9. Install the replacement switch.

    Make sure you connect the wires to the COM and N.O. terminals.

  10. Adjust the position of the switch bracket.
    1. Loosen the two nuts that fasten the bracket into place.
    2. Move the bracket until the switch actuates when the carriage reaches 0.50±0.03 inches from the home position.
  11. Return the Cal pin to its storage position.
  12. Return power back to the table and replace table and gantry covers.

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. Using the service switches on the MTCB, move the Table up and down, and the Cradle in and out.
  4. Use the gantry control keys to move the Table up and down, and the Cradle in and out.
  5. When the Table functions properly, reinstall the Table Base Covers, the Side Panels and the Gantry Side Cover.