• Topic ID: id_23553957
  • Version: 2.0
  • Date: Sep 26, 2020 10:11:35 PM

Elevation Potentiometer Belt Tension Adjustment

Prerequisites

Overview

Procedure

  1. Turn the Tension meter on.

    For the Gates Sonic Tension Meter model 507 C, press the Measure button and then press the Hz button. The green LED will be flashing. For an equivalent meter, make sure it is setup to measure frequency.

  2. Raise the Table to maximum height.
  3. Move the Cradle and IMS to OUT limit position.
  4. Remove power from Table by turning off 120VAC, Axial Drive and HVDC switches on Service Switch Panel.
  5. Remove the IMS Side Cover (Right).
  6. Disconnect 2 GND cables from the Table frame.
  7. Remove 2 upper support brackets of the side plates (right) by unscrewing its 2 (x2) screws, and open the side plates.

    Figure 1. Table Covers Removal

  8. Hold the tension meter sensor on the middle of the upper side of belt, and lightly strum the top of the elevation potentiometer belt in the middle of the belt span to make it vibrate. Measure the frequency using the laptop belt frequency tool and procedure.
    note:

    The closer the meters sensor is to the belt without touching, the better the reading will be.

    A waveform graphic will show up on the LCD screen. After the signal is processed properly, the belt frequency will appear on the screen and a successful measurement on the Gates meter will beep 3 times, and the green LED turns on steady to indicate a successful reading.

    Adjust Belt Tension in small increments. If the frequency is high, loosen the belt. If the frequency is low, tighten the belt.

  9. Compare measurement value to the IMS belt frequency spec of (Between 145 and 190 HZ).
  10. If frequency is out of spec, proceed to the following sub-steps:
    1. Loosen 2 screws.
    2. Adjust belt by sliding the potentiometer bracket, and then tighten the two screws securely while keeping tension on the belt.

      Figure 2. Belt Tension Adjustment

    3. Continue to adjust belt and measure frequency until it is within spec.
  11. Make sure that all 3 switches (Axial Drive, HVDC, 120VAC) are turned off, and re-install the Table Covers.

Finalization

  1. Power up the Table from the Service Switch Panel.
  2. Verify that the Table up/down function is operating normally.