Variable amplitude for shaker table

[ftrflyr]

Hi All,

I built this shaker table: and I am now trying to change the amplitude so that it is no longer fixed but instead variable. The frequency I can change but the amplitude is fixed given this design.

Does anyone have any suggestions on how to be able to change the amplitude so I can test for a range distances?

thanks!

 

[berkeman]

Hi All,

I built this shaker table: and I am now trying to change the amplitude so that it is no longer fixed but instead variable. The frequency I can change but the amplitude is fixed given this design.

Does anyone have any suggestions on how to be able to change the amplitude so I can test for a range distances?

thanks!

Since the amplitude of the vibration is crudely controlled by the spinning mass, you need to either modulate the mass or the distance the mass is separated from the motor shaft.