Magnetic simulation software

[gentlevoice]

Hi DIYs,

For those of you who are interested in magnetic simulation I have found this software, Vizimag, which is available at:

www.vizimag.com.

There's a free download available, and the sales price is $39,75.

Although not perfect in all respects I find it very useful for visualizing magnetic fields and getting an idea about the magnitude of the fields.

And, not least, to me it is very simple and intuitive to use.

Regards,

Jesper

[John_E_Janowitz]

We use FEMM for basic 2d FEA. Without a 3d package you can't do everything needed to model a woofer, but you can check for symmetry in the gap, verify BL curve shapes, etc. It's very powerful for a free application.

http://femm.foster-miller.net/wiki/HomePage

John

[Stee]

about balancing fields
(i have a patent of this natural compensation with 2 devices)
http://www.esafono.it/jbl.pdf

[Bhu108]

Lucky me, I just got a pair of 66 Studio monitors from a GoodWill outlet. The cabinets are beat up but Hooked them up outside with a little mini Denon CD/receiver unit, which other than Its stout build an small size doesn't sound that good, but let me test before lugging them up stairs and hey the work!
So first question:
Is there a trick to removing the grills? they are a heavy metal screen cover with heavy fabric. One has been pried partially open and the cloth is coming off. I tried but did want damage it by prying hard.
2. Does some have the crossover schematics they could send me?
3. I hear that there is a upgrade to the crossover by changing Caps doe anybody have that information?
I am going to see if I can do some cabinet restoration to the oak veneer by steaming the dents and scratches out, then do a finish removal and restoration with Western wood doctor. If you have not used the steam tric to pop out scratched I will post the technique. many years ago I got hired at a high end Stereo shop by steaming a big scratch on a JBL L-100 and L200 cabinet. They were blown away with the results and hired me on the spot.

[Bhu108]

Lucky me, I just got a pair of 66 Studio monitors from a GoodWill outlet. The cabinets are beat up but Hooked them up outside with a little mini Denon CD/receiver unit, which other than Its stout build an small size doesn't sound that good, but let me test before lugging them up stairs and hey the work!
So first question:
Is there a trick to removing the grills? they are a heavy metal screen cover with heavy fabric. One has been pried partially open and the cloth is coming off. I tried but did want damage it by prying hard.
2. Does some have the crossover schematics they could send me?
3. I hear that there is a upgrade to the crossover by changing Caps doe anybody have that information?
I am going to see if I can do some cabinet restoration to the oak veneer by steaming the dents and scratches out, then do a finish removal and restoration with Western wood doctor. If you have not used the steam tric to pop out scratched I will post the technique. many years ago I got hired at a high end Stereo shop by steaming a big scratch on a JBL L-100 and L200 cabinet. They were blown away with the results and hired me on the spot.

[gentlevoice]

@BHU108,

Congratulations on your "new" speakers, however, I wonder why you post your message in this thread - it's about magnetic simulation software

Best regards,

Jesper

[Jmmlc]

Hello Jasper,

I use myself FEM.

here attached a magnification of the gap region for an excitation coil motor I would build.


Best regards from Paris, France

Jean-Michel Le Cléac'h

Originally posted by gentlevoice

For those of you who are interested in magnetic simulation I have found this software, Vizimag,

[Bhu108]

Whoops! I notice that it didn't thread under Celestion 66 Ditton happen right after the post. Sorry about that don't know what happene.d

[gentlevoice]

@bhu108,

No worries - hope you find the help you are looking for ...

@jmmlc - Bonjour Jean-Michel :-)

And thanks for suggesting the FEMM software. I know about this, however, my reason for mentioning the Vizimag software was that I found it to be very easy and straightforward to work with and it still provides me with the kind of information that I seek.

I realize other people may have different preferences.

Greetings from Denmark -

Jesper

[Jmmlc]

Hello Jesper,

In fact I didn't know Vizimag and I plan to try it during my summer holidays.

Thank you for providing the information.

Best regards from Paris, France

Jean-Michel Le Cléac'h

Originally posted by gentlevoice
[B
my reason for mentioning the Vizimag software was that I found it to be very easy and straightforward to work with and it still provides me with the kind of information that I seek.
[/B]