linear actuator, buttkicker, etc...
 

I'm planning on trying to build a good seat-shaker for a friend, just to experiment.
I have strong magnets and a coil with a core.
So I need a good suspension to get the coil and core centered between magnets.
How can I build a good suspension that doesn't restrict the movement too much?
I have strong short springs that don't attract much to magnets.

Did a fast setup. The springs keep the magnets away and the magnets keep everything together by pulling force only. These are tough springs!
The coil is 20Ω DC , that's a pity but at the moment I have no other coil that is suitable.

It is vibrating clearly at only 10W but nowhere near 'buttkicker' levels of course. I don't expect to reach that efficiency either.

How to improve?

pic's or it never happened, right? :rolleyes:

It's a good idea.

A regular enclosed subwoofer with a mechanical connection to the couch works great too.

Experiment, experiment.

Any further progress here? Interesting project.

Sorry Alvis. Haven't got time, living alone and full time job...
If I could just get a mechanical setup to work with but I doubt that magnets are a good thing, since they attract to the iron core by themselves, it might work against the goal.
I would like to experiment without core, or without magnets.

Any thought is appreciated!
Thanks for your interest.

Your transformer suspended on springs in a C core wired out of phase:

I don't get it completely, would the springs be between the coil and de C-core?
Where does the vibration come from?
I doubt the coil would want to jump up and down the core this way.

Here you go, how about now?

Thanks for the drawings.
I'll have to do more tests to see what it does. Just need some spare time first.
thanks.