foamcutter Putting the vibration damper in series with the load will help to absorb resonanace but will increase the position error.
The idea is to have the motor waste it's resonant enery trying to vibrate a small flywheel which is not coupled to the load.
Silcon sealer was one thing i considered a s the active element. There is a a metric called loss factor or delta tan which basically amounts to how much energy is lost when a material springs back after being compressed. Obviously for this application higher is better but i have no idea how much is enough. The only data i could find showed silicon rubber having a loss factor of between 0.07 and 0.15 . Differnet grades of sorbothane range between 0.3 - 0.6 . The bit of foam I used was proably nowhere near that.
It would be good if we could keep the disscusion going on this one and encourage a bit of experimentation. |