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Old 16th August 2004, 11:24 PM   #1
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Default Horn Folding Advice?

I'm currently trying to do up my basshorn in acad. I have the flare done. Does anyone have any tips to help me with the folding of it?

Thanks!
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Old 17th August 2004, 07:09 AM   #2
Coolin is offline Coolin  Netherlands
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As little as possible..............

No sharp corners , round them or use large 45 degree pieces.
Use the walls to extend the mouth as much as possible.

Coolin
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Old 17th August 2004, 09:55 AM   #3
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Method I use with Autocad is to section the horn profile into 50 segments (I do this via a spreadsheet which generates an Autocad script, drawing the 50 segements automatically).

Using the osnap to centre, you can rotate groups of segments whilst keeping the centre of each segment together. Just a matter of selecting group of segents, rotating, select another group etc. Easier to do than describe!

Cheers
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Old 17th August 2004, 09:57 AM   #4
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I've been messing with it for a few hours.. And I've got this. Please remember it's my first time folding a horn.. so don't be too hard on me Is there anything horribly wrong with the way i've done this?

I haven't put a divider in the rear chamber yet.. I want to be able to adjust the rear volume after they're built.
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Old 17th August 2004, 10:06 AM   #5
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Forgot the picture
Attached Images
File Type: jpg folded.jpg (45.0 KB, 260 views)
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Old 17th August 2004, 10:23 AM   #6
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There is a trade-off between the least folds possible and the most accurate contour possible.
You are using too much folds IMO, making response at the upper end worsen and making the cabinet more complicated to build.

I'd suggest a simple S-shaped fold like member mikee12345 is using:

http://homepages.paradise.net.nz/quadroph/digitor.htm

Regards

Charles
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Old 17th August 2004, 10:26 AM   #7
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Thanks for the advice! The problem I have with using less folds, is that this is quite a big horn... in the drawing there, it's 70cm wide, 85cm deep, and 125 cm tall. I'll try experementing with less folds and see if i can get it in a similar sized box.
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Old 17th August 2004, 11:00 AM   #8
synergy is offline synergy  United Kingdom
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you're not really using the space as efficiently as possible

try firing the driver upwards making it travel across the top of the box first in a similar way to how Rog Mogale has done his 1850 Horn
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Old 17th August 2004, 12:30 PM   #9
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Here are some pics showing sub I'm working on. This is for a 12" driver.

First pic shows side and 3d view of folded segments - note the centres of each segment are kept joined.
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File Type: gif subfold1.gif (21.7 KB, 201 views)
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Old 17th August 2004, 12:35 PM   #10
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This pic shows how I put the wood around the flare and 3d view of woodwork.

Hope some of this helps.

Cheers
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File Type: gif subfold2.gif (23.7 KB, 192 views)
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