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Old 1st November 2012, 06:48 AM   #171
schmeet is offline schmeet  United Kingdom
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Quote:
Originally Posted by Zeinna View Post
I'm new to TL models and I'm trying to model the attached design. It's a small enclosure (30cm x 23cm x 15cm approx.). I'm using a Peerless 5.25" HDS 830860, parameters I've entered into the the app. However, I'm having a hard time getting my head around the splits and branches, maybe because of the way I visualize them on the graphic page.

Any quick pointers on the process flow for this? It's basically a no-tapper line with 4 elements/branches.

Thx
Hi Zeinna, the enclosure that you attached is a TL with no taper and no branches. It is just one long element. You don't really need to model bends so just imagine the line straightened out.

It is only a branch when the air/sound litterally has two ways it could go.

P.S. for accuracy you can model bends by having slight expansions in the cross sectional area, but don't get bogged down in hat for now...
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Old 1st November 2012, 08:52 AM   #172
schmeet is offline schmeet  United Kingdom
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Quote:
Originally Posted by Mark.Clappers View Post
When the window firsts pops up there is already 0.5 filled in. When I just press O.K. the window pups up again. When I type 0,5 it accepts it.

Maybe something to do with my keyboard / language settings (Dutch format)? I am running win7 64bit on an Asus N76V core I7 notebook.
Yeah I think it is something to do with language settings. It doesn't recognise 0.5 as a number.

I have made a small change. Could you see if that works.
Thanks
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Old 1st November 2012, 09:53 AM   #173
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Hi Schmeet,

I am in the office right now but I will give it a try tonight and report back to you.
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Old 1st November 2012, 05:21 PM   #174
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Hi Schmeet,

It works perfectly now, thnx!
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Old 1st November 2012, 08:29 PM   #175
schmeet is offline schmeet  United Kingdom
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Latest update has given you the option of Parabolic, Exponential or Conical Taper for each element.

I haven't updated the geometry viewer to reflect this yet...
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Old 2nd November 2012, 09:05 AM   #176
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Okay, it seems 'parabolic' is equivalent to tapering 1 (or 2) sides of the cabinet, and 'conical' is like tapering all 4 (sort of a truncated pyramid), but what is 'exponential' equivalent to?
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Old 2nd November 2012, 09:14 AM   #177
schmeet is offline schmeet  United Kingdom
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Look up the three terms on wikipedia to understand what they are. But essentially, I have always been doing Parabolic as a standard. A parabolic taper has a linear reduction in area thus when 'width' remains constant the other reduces linearly (Constant width TL).

Conical means that the radius (or diameter) reduces linearly. If your enclosure was spherical then it would taper at a linear rate.

Exponential means that it reduces exponentially This is what gives you that horn effect..

The graph below shows the shape each enclosure would have if the (other) width remains constant.

Yellow is conical, red is exponential.
Attached Images
File Type: jpg TaperExample.jpg (54.4 KB, 170 views)
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Old 2nd November 2012, 09:36 AM   #178
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Well, I doubt many will be curving the sides of their cabinets.

I suspect changing the flare rate by slanting varying numbers of straight sides, however, will be commonplace if we can predict the results.
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Old 2nd November 2012, 10:21 AM   #179
schmeet is offline schmeet  United Kingdom
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I have now updated it so that the geometry viewer shows the correct flare type.

If you have straight sides then your flare type will always be parabolic as the area will increase linearly.
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Old 2nd November 2012, 02:58 PM   #180
schmeet is offline schmeet  United Kingdom
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Another small update. When you select an element with the Enclosure window it will highlight that element in blue in the Geometry window.

Just another attempt to make it all a bit more easier to use.
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