• Topic ID: id_16157498
  • Version: 4.0
  • Date: Jan 23, 2022 10:51:46 PM

Gantry Cover Tilt Sensor Replacement

Prerequisites

Overview

This procedure defines the steps necessary to replace the Gantry front and rear cover tilt sensor replacement.

1 Preparation

Procedure

  1. Move Table to the home position.
  2. Remove gantry right side cover.

    Refer to Parts Replacement > Gantry > Enclosure > (Cover Removal Procedures).

  3. Stop the rotor of X-ray tube in case of Liquid Bearing Tube before HVDC off. Refer to Liquid Bearing Tube Rotor stop procedure for details.
  4. Turn OFF the Axial Drive, HVDC and 120 VAC switches on the gantry’s Service Switch Panel.
  5. Remove the gantry left side cover, top covers and front cover.

2 Front Cover tilt sensor

Procedure

  1. On the back of the front cover disconnect touch strip cable from the tilt sensor.

    Figure 1. Gantry Tilt Sensor on Front Cover

    Figure 2. Front cover Tilt Sensor

  2. Remove 2 nuts (7 mm socket) that secure touch sensor pad to the front cover.
  3. Install new touch pad and tighten the 2 nuts to the following values.

3 Rear Cover tilt sensor

Procedure

  1. Remove the bore cover.

    Refer to Parts Replacement > Gantry > Enclosure > (Cover Removal Procedures).

  2. Remove four (4) rivet seals from tilt sensor.

    Figure 3. Rivet Seals

  3. Pull out the cable with connector underneath the hole in the bore, and then disconnect the connector.

    Figure 4. Tilt Sensor Cable Connector

  4. Turn the rivets, and remove the tilt sensor from the bore cover.

    Figure 5. Rivets

  5. Install the new tilt touch sensor.
  6. Reconnect the sensor cable connector.
  7. Attach rivets seals on the four rivets.
  8. Restore the gantry covers.

4 Gantry reassembly

Procedure

  1. Enable 120 VAC HVDC and Axial Drive service switches from the service switch panel. Press the table drives enable button on the lower right corner of the service switch panel.
  2. Install the gantry right side cover.

5 Finalization

Procedure

  1. From the front cover control panel, press and hold the gantry forward tilt button and then press on the tilt sensor while still tilting gantry. Verify the gantry tilt stops.