Vibration plate installed countertops are flawed, lack of hardness. Bottom is too thin, if suspended in the device table, will cause vibration too weak, countertop thickness should be at least 1-1/2 ", so as not to vibration, must be equipped with cylindrical foot triangular support pieces, the table is not level.
Fast pace of the machine parts from the vibration plate causes slipping parts too.

Power fluctuations, the controller need to re-adjust to power fluctuations.

Plate with debris, and the base plate fastening screws are not tight or the wrong position. Material changes should be trimmed back and re-tune the disk chassis; chassis improperly adjusted.

Part Question: tolerance, bending, oil and so on.

In the case of using an air blow may cause some problems may exist: pressure instability, air pollution, water or oil, these contaminants will remain in the vibration plate surface, resulting in feed does not even go slower. Gas supply must be clean, dry, with a separate regulator, filter. Do not use rigid pipe will reduce feeding performance. Flexible hose should be used.