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Old 16th August 2010, 04:05 AM   #51
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Version 1.4.0:

1. No longer restricted to square cross-sections (fixed that bug!).

2. Various bugs fixed with panel length calculations (internal panels).

3. Optimization now centered around initial horn expansion, target Length (L) and target mouth area (S4). Plot of cross-section will now go red if negative expansion is detected in the folding.

4. New graph showing horn expansion in the suggested folding.
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File Type: zip Stepped-TH 1.4.0.zip (23.9 KB, 143 views)
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Old 16th August 2010, 02:46 PM   #52
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Like Hornresp, Stepped-TH keeps getting better & better!!!
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Old 17th August 2010, 12:06 PM   #53
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Amazing work!

This is how I found works for me after a bit of fiddling.

Set w to the desired depth of the horn (seen from the blueprint)
Goalseek Dcheck to 0 by changing Delta
Goalseek L(a,c) to desired length by d
Goalseek S4 to desired s4 by h

Repeat until it matches fairly well.

Could this be turned into a macro?
Repeat it 10 times or so.
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Old 17th August 2010, 08:40 PM   #54
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Thank you DW, your post JUST taught me Goal Seek! I've been using w as width (40.64cm or 16") instead of depth. I see I need to set d as (40.64) and GS with w.

I said that wrong! w = 40.64cm & GS L(a,c) with d.

Last edited by BP1Fanatic; 17th August 2010 at 09:04 PM.
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Old 17th August 2010, 09:12 PM   #55
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Does Mounting Depth include Magnet Height in the Cross Section chart?
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Old 18th August 2010, 02:17 AM   #56
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Quote:
Originally Posted by David_Web View Post
Amazing work!

This is how I found works for me after a bit of fiddling.

Set w to the desired depth of the horn (seen from the blueprint)
Goalseek Dcheck to 0 by changing Delta
Goalseek L(a,c) to desired length by d
Goalseek S4 to desired s4 by h

Repeat until it matches fairly well.

Could this be turned into a macro?
Repeat it 10 times or so.
w actually represents the width of the horn, but the goal-seeking should work (within limits) with any of the three dimensions: d, w and h.

I haven't investigated if it can be turned into a macro. I want to get the math sorted out first
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Old 18th August 2010, 02:47 AM   #57
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Quote:
Originally Posted by BP1Fanatic View Post
Does Mounting Depth include Magnet Height in the Cross Section chart?
That correct. You can check the results by looking at the dimensions suggested in the plot of the driver.
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Old 18th August 2010, 03:07 AM   #58
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Version 1.5.0:

1. More bugs fixed with internal panel length calculations (sigh).

2. Added the ability to plot (highlight) the different sections of the horn

3. Added the ability to vary the flare rate throughout the horn (based on ratios to the initial rate).


If I have some time tomorrow (and if no more bugs show up), I'll include some braces in the parts list. The question though is how much bracing can I add (and where) before the response of the horn deviates too much from HornResp predictions...
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File Type: zip Stepped-TH 1.5.0.zip (26.4 KB, 146 views)
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Old 18th August 2010, 08:57 AM   #59
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Are you basing the naming on viewing the TH with the opening facing towards you standing up?
To me it should be based how you see the drawing.
Height is height in the graph
Width is length in the graph
Depth is perpendicular to your screen.

Maybe you could add some notes and explain whichever way you go with red triangles.

Not sure how much bracing really changes things.
However something like this should suffice for most.
http://www.martinsson.cc/blog/images/THAM15-02.jpg
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Old 18th August 2010, 11:26 AM   #60
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Quote:
Originally Posted by David_Web View Post
Are you basing the naming on viewing the TH with the opening facing towards you standing up?
That's correct.


Quote:
Originally Posted by David_Web View Post
Not sure how much bracing really changes things.
However something like this should suffice for most.
http://www.martinsson.cc/blog/images/THAM15-02.jpg
I'm planning to implement something quite similar to that. Would Akabak model the effects of such bracing?
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