80 odgovor(a) na ovu temu

[Magura]

Zen Mod, za 10 November 2009 - 23:56, kaže:

OK - so just let's hope that both - Serbian and Froggy Terrorists will arrive .....

Yeah, that could be rather good fun.


Magura

[Zen Mod]

Matrice and Patrice -- how to translate that in Engrish ?

anyway - molds - Male & Female parts

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[Zen Mod]

further

spider test - used paper napkin

these 9 pics - molds for cone/former combo , whizzer ,spider , surround

I believe Metaldanske will make molds for baskets these days .......

I'm just fookin pic's resizer

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[michabass]

Now that is something else!!! Molds look awesome!

[michabass]

btw those molds will need some bleeder holes and grooves machined to hold some heaters.
Next thing I would look into is:
http://www.papiermac...er-mache-paste/

if you're going to make the cones out of paper, which I sincerely hope you will...

now I wish I had access to a lathe myself...

[Zen Mod]

cones will be made of carbon fiber ( if I remember well)

surround - leather

spider - dirt cloth

basket - plastic reinforced with fibers

[Magura]

Zen Mod, za 07 December 2009 - 00:20, kaže:

cones will be made of carbon fiber ( if I remember well)

surround - leather

spider - dirt cloth

basket - plastic reinforced with fibers

That's pretty much the plan for now. I may decide to use clean cloth for the spider later on, if not for other reasons, then just as an experiment.

The cones could also be paper or Kevlar, as the mold is to be lined with film.

For heating the molds, I'm simply going to mount an iron to each half, hence the thick block of aluminium for spreading the heat even.

Magura

[andrics]

Hi
For cone I use rohacell . Sounds better then fiberglass . carbon or aramid(kevlar).
Making mold for thermo forming is not problrem for you .

http://www.clarasoni...en/rohacell.php

[Magura]

Hi Andrics,

Thanks for the suggestion, I sure will try and see if I can get some of that material.

To make a test should be quite easy, as the mold will actually work for thermo forming as well.

Can I see the drivers you've made?


Magura

[andrics]

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[Sipi]

E Slobo, ovo nisi pominjao
Svaka cast !

[Zen Mod]

andrics, za 09 December 2009 - 15:35, kaže:

[Magura]

andrics, za 09 December 2009 - 15:35, kaže:

Nice design, I feel like stealing a few ideas


Have you made other drivers?

I now have an ongoing correspondence with Nick at Clarisound about Rohacell. It sure could turn out to be interesting.


Magura

[andrics]

I buy rohacell directly from factory. I give you clarasonic web address only for information. For your driver I suggest you 2mm thick ROHACELL® 31 IGF . If you have problem to buy rohacell i can give you few sheets for testing 2mm thick ROHACELL® 51 or 71 IGF. I don't buy 31 because i made woofer and for me few grams more-less is not problem .
What is diameter of your cone ?

I have only one driver more . Ribbon 1.7 m long . Prototype working in my friend setup with 2 woofers like on picture. Cutoff frequency is 200 Hz active crossover set at 200Hz 24 db linkwitz filter.

[michabass]

Isnt rohacell only suitable for bass units? I thought the goal here is to produce a FR speaker?

@andrics
ovaj tvoj zvučnik izgleda fenomenalno!

[Magura]

andrics, za 09 December 2009 - 17:12, kaže:

I buy rohacell directly from factory. I give you clarasonic web address only for information. For your driver I suggest you 2mm thick ROHACELL® 31 IGF . If you have problem to buy rohacell i can give you few sheets for testing 2mm thick ROHACELL® 51 or 71 IGF. I don't buy 31 because i made woofer and for me few grams more-less is not problem .
What is diameter of your cone ?

I would sure like a few sheets of 2mm thick ROHACELL® 51 for a test. And if possible a few small pieces of scrap for getting a feel for working with the material, as I'm new to this material.

My cone is 150mm diameter.

How much is 2mm sheet directly from the factory?

Cheers

Magura

[Magura]

michabass, za 10 December 2009 - 10:16, kaže:

Isnt rohacell only suitable for bass units? I thought the goal here is to produce a FR speaker?

They claim it's suitable for FR drivers as well. Time will show if their claim hold true.


Magura

[andrics]

I don't see any reason why is rohacell or any other material, not good for FR cone . This is very good,ligth, hard, sound-neutral material. My woofer is 12" with 113 mm coil . Moving mass include spider and surround is around 55 - 65 gram depending of laminating material . For laminating I use aramid (kevlar ) 69g/m2 or glassfiber 35 g/m2 from both side of cone and still have low mass. For 150 mm cone diameter friom rohacell 51 mass of cone will be around 5 gram. This is a very good starting point .

Sorry for my Tarzan English i learn English from movies and internet .

[Zen Mod]

andrics, za 13 December 2009 - 02:25, kaže:

...

Sorry for my Tarzan English i learn English from movies and internet .

still in better position than Metaldanske ...... he learned his Engrish from Russians

[andrics]

@magura
Did you have magnetic simulation of your magnet motor?