A challenge for you: Shouldn't it be possible to have some (small amount) of iron in the membrane in the proper location and let that hold up the membrane by magnetism. In that way it should not have to be suspended on any side and not need for any corrugation... it must be possible... ;-) and then induce the (music) signal by induction so that no wires is attached to the membrane... a compleatly floating transducer.. (I'm probably a April fool 🙂 )
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except that metal does not hover above a magnet but will end up in/on it , hehe damned i read april fools to late haha i was thinking like wtf TNT i've seen you so many times before saying interesting stuff this cant be happening haha
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Yes - one need to construct a field that keeps it in position... 😉 - is it possible?
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PS. It was not completely an april fool,,,, DS.
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PS. It was not completely an april fool,,,, DS.
well i am not sure if you watched the latest videos 🙂 but i did use some coils out of phase. to lower resonances of the foil where it is not driven. oooooor use DC on those coils, both work... but its a waste of power at the same time 🙂 i removed allot of flapping... but cant compare to just a stretch foil 🙁 unfortunately
It's probably me in the middle. Like an donkey between haystacks.
Yes, so what about 3D printed suspension for the membrane?
Yes, so what about 3D printed suspension for the membrane?
i receive my first 3d printer next week or so... so cant help you out there 🙂 might take me 1000 years to know what i have to do using it haha
That's great!
Welcome to the magic world of 3D printing.
I think you'll be up in no time.
Which printer did you buy?
What CAD software do you intend to use?
Welcome to the magic world of 3D printing.
I think you'll be up in no time.
Which printer did you buy?
What CAD software do you intend to use?
i am not sure at all, since it was gifted to me an creality Ender 5 pro. to me any 3d printer is, well a 3d printer. 🙂 i believe a modified Ender 3 has the benchy record 😉 looks like poo, but hell she did it with a affordable 3d printer that should have no potential to be the fastest 🙂 hehe
she just came along and Nuked the previous record 🙂 super cool !
well i think i need to use something 3d then...... i guess 360.... but to be fair i hate drawing in 3d 🙁 but have to learn somewhere along the way 🙂
she just came along and Nuked the previous record 🙂 super cool !
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Got the magnets:
So how correct is the FEMM analyzis?
I put two magnets on a 1.5 mm steel plate:
Set it up in FEMM:
Magnetic flow density between the magnets 1 mm above the magnets:
Magnetic flow density between the magnets 2 mm above the magnets:
I then measured the reality, the Hall sensor is about 2 mm from the edge of the probe.
With a distance of 1 mm in the first parts of the video the Hall sensor is barely over the magnets.
The density shifts heavily as in the first graph above. Perhaps it has to do with that the magnets are not symmetric on the steel plate.
With a distance of 2 mm in the last part of the video, the Hall sensor is right where the membrane should be.
Compare with the second graph above.
So I'd say that the FEMM simulations can be trusted.
So how correct is the FEMM analyzis?
I put two magnets on a 1.5 mm steel plate:
Set it up in FEMM:
Magnetic flow density between the magnets 1 mm above the magnets:
Magnetic flow density between the magnets 2 mm above the magnets:
I then measured the reality, the Hall sensor is about 2 mm from the edge of the probe.
The density shifts heavily as in the first graph above. Perhaps it has to do with that the magnets are not symmetric on the steel plate.
With a distance of 2 mm in the last part of the video, the Hall sensor is right where the membrane should be.
Compare with the second graph above.
So I'd say that the FEMM simulations can be trusted.
Nice magnets! I recommend the surface protection by two-component epoxy coating. If the surface damaged at one point, the Ni coating can "bubbling".
Yes, they are very nice. It was WrineX suggestion.
Thanks for your advice. I never had any of these problems though.
Thanks for your advice. I never had any of these problems though.
Regarding tension gauges, these simple types might be easier to use:
What tension can one expect in a planar?
What tension can one expect in a planar?
Better still:
The black rubber foot at the top can be pressed against the membrane, so one will use it upside down.
To make the pressure area larger, an extra foot is easily design and 3D printed.
Anyone know where to buy it in Europe, not being a company?
Still no idea what tension one can expect in a planar?
The black rubber foot at the top can be pressed against the membrane, so one will use it upside down.
To make the pressure area larger, an extra foot is easily design and 3D printed.
Anyone know where to buy it in Europe, not being a company?
Still no idea what tension one can expect in a planar?
With one of these springs should it be possible to make my own:
Plus some 3D printing of course.
Plus some 3D printing of course.
I hope test these membrane types/thickness:
BOPP 20 µm,
PEN 12 µm (Teonex),
Mylar 2 µm,
Mylar 5 µm,
Mylar 7,5 µm,
Mylar 10 µm,
Mylar 12 µm, (3M 74 film with glue),
Mylar 5 µm, (one side metallized),
Mylar 10 µm, (one side metallized),
Mylar 12 µm, (one side metallized).
The thinner membrane might be tested in a sandwich manner; mylar/aluminium/mylar.
BOPP 20 µm,
PEN 12 µm (Teonex),
Mylar 2 µm,
Mylar 5 µm,
Mylar 7,5 µm,
Mylar 10 µm,
Mylar 12 µm, (3M 74 film with glue),
Mylar 5 µm, (one side metallized),
Mylar 10 µm, (one side metallized),
Mylar 12 µm, (one side metallized).
The thinner membrane might be tested in a sandwich manner; mylar/aluminium/mylar.
nice you go all out with testing !!
my guess everything under 6 micron you dont need to test 🙂 12 or thicker is the most used, even in tweeters. but of course it wont hurt to take them into the test maybe we learn something new
my guess everything under 6 micron you dont need to test 🙂 12 or thicker is the most used, even in tweeters. but of course it wont hurt to take them into the test maybe we learn something new