Metalfab Hindon-Invicta L Series - Manual (Page 14)

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6.5 Noisy vibrator
NOTE: Vibrating machines are inherently louder than industrial motors.
1) Check for loose or failed vibrator mounting fasteners.
2) Check for loose end cover fasteners and internal fasteners.
3) Check for loose O.B. weight clamping bolts. CAUTION: Always ensure electrical power
is de-energized prior to handling rotor shaft with hands.
4) Check for failed bearing(s).
6.6 Vibrator runs too slowly (does not reach synchronous speed)
1) Verify that terminal box connection is for correct voltage (i.e., that it is not set for 460 Volt
and line is 230 Volt). Refer to Figures 2 and 3.
2) Verify that line voltage is not too low.
3) Verify that line frequency is as vibrator nameplate specifies (this normally applies to field
generator operated equipment only).
4) Verify that rotor shaft turns freely. CAUTION: Always ensure electrical power is de-
energized prior to handling rotor shaft with hands.
6.7 Twin vibrators not synchronizing
1) Verify that both units are energized.
2) Verify that the vibrators are connected so that they will contra-rotate (opposite rotation).
3) Verify that the O.B. weights are set the same on each side and on both vibrators.
4) Verify that the vibrator mounting beam is rigid and not flexing excessively when operating.
Also, in the case of equipment such as feeders and screens, be sure that no "off motion"
exists on the live frame.