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linear actuator, buttkicker, etc...
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Old 2nd June 2012, 10:15 AM   #1
ßart West-VL. is offline ßart West-VL.  Belgium
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Default 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.
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Old 2nd June 2012, 01:39 PM   #2
ßart West-VL. is offline ßart West-VL.  Belgium
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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?
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File Type: jpg P1000637.jpg (51.3 KB, 118 views)
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Old 2nd June 2012, 01:45 PM   #3
Alvis is offline Alvis
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It's a good idea.

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

Experiment, experiment.
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Old 4th June 2012, 02:07 PM   #4
Alvis is offline Alvis
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Any further progress here? Interesting project.
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Old 4th June 2012, 04:58 PM   #5
ßart West-VL. is offline ßart West-VL.  Belgium
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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.
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Old 5th June 2012, 04:23 AM   #6
NEO Dan is offline NEO Dan  United States
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Your transformer suspended on springs in a C core wired out of phase:
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Old 5th June 2012, 04:10 PM   #7
ßart West-VL. is offline ßart West-VL.  Belgium
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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.
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Old 5th June 2012, 08:08 PM   #8
NEO Dan is offline NEO Dan  United States
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Here you go, how about now?
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Old 6th June 2012, 04:11 AM   #9
ßart West-VL. is offline ßart West-VL.  Belgium
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Thanks for the drawings.
I'll have to do more tests to see what it does. Just need some spare time first.
thanks.
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