Reason:

(1) The test piece is distorted.

(2) The shaker has not collapsed firmly.

(3) The pump is faulty.

(4) The joint attached to the shaker and the slip table are not aligned.

(5) The bearing of the slip table is faulty.

Solution:

(1) Remove the test piece and check if it can vibrate.

(2) When the vibratory apparatus is tilted horizontally, check whether the vibratory apparatus is tilted horizontally to the point where it hits the stopper.

(3) Check whether the pump under the slip table is running when the shaker is tilted horizontally and the breaker is switched on (power off).

(4) Install the joint, turn the shaker over horizontally and check that the bolts for connection go in smoothly.

(5) After checking (1) to (4), with the breaker switched on (power off), push the slip table by hand and check that it moves smoothly.