Vibration plate: Can you adjust the imbalance?

When a vibratory plate stops working properly, the idea often arises of having to adjust the imbalance of the plate. Whether this is possible, how the plate works with the imbalance and what adjustment options there are, read here.

How does the imbalance work?

The vibrating motion of the vibrating plate is generated by several waves, on which imbalance masses sit. As the shaft rotates, the centrifugal forces of the imbalance masses act on the bottom plate, causing it to vibrate. At the same time, the vibrating plate is moved either forwards or forwards and backwards.

The plate is thus first lifted by the rotational movement of the imbalance and then pressed back into the ground when the centrifugal forces act. This principle applies only to the vibrating plate - vibratory rammers work fundamentally different (a motor pushes the plate down, a spring device makes them jump back up, the rammer "jumps" so on the ground).

Set imbalances

Since it is at the imbalances - as just described - to unbalanced masses act, nothing can be adjusted. Wave and unbalance together are also called "exciters" and are a complete component.

Waves and imbalance weights can not be adjusted but must remain in a well-defined position to function properly. When disassembling a pathogen, it must later be reassembled exactly the same, the position of the parts among themselves must not be changed.

For vibratory plates with forward and reverse (alternating), the mechanical control is more complicated than with vibrating plates, which only move forward. In the vibrating plates, which move in both directions, the circular oscillators generate counter-rotating movements, which must be precisely coordinated (correct position of the centrifugal masses).

The position taken by both vibrators to each other determines the "walking speed" of the vibrating plate in each direction and reversing the disk travel direction.

Adjustment of imbalances

As a rule, the imbalance can be adjusted with the help of a gear wheel. In a winding groove in the unbalance engages a pin, which rotates the imbalance in a clockwise direction, if you hold the reversing lever pressed.

In the case of hydraulically driven vibratory plates, on the other hand, split imbalances are used, which either interact or work against each other, depending on which direction the exciter is running.

Tips & Tricks

Work on the pathogen should be left to knowledgeable professionals. Even the removal and replacement of a pathogen often takes hours on many plates, but many older models often can not do it.

Video Board: Vibration Plate Machine - How to Video - Balancing / Speed Control for Platform