## Simple Cone Layouts

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PyroJoe
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### Simple Cone Layouts

This is a simple method to layout cone sections. It is not new and can be found in various sites on the internet.
It is not a highly precise or accurate method, but should provide a general method for producing cone sections with limited resources.

Draw your cone on the lower left corner with the base parallel and near the bottom of the sheet. As shown below:
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PyroJoe
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### Re: Simple Cone Layouts

Next use a compass to draw a circle the same diameter as the base.

http://en.wikipedia.org/wiki/Compass_(drafting)

Math can be used to calculate the circumference.

If the math is not a option then a reasonable small easily shaped wire can be layed upon the circle and trimmed as precisely possible to fit the circle(circle#1).

The goal here is to create a wire the length of the circumference of the circle.
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PyroJoe
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### Re: Simple Cone Layouts

Next draw line#1 and line#2 with a straight edge, make sure to look down the edge to insure it is straight!
This should create point#1.

Then Draw arc#1 and arc#2 with a compass.

Fit precisely as possible the wire onto arc#2 (use tape if needed of the type that won't tear the paper when removed). Then place a dot at the end to the right where the wire ends.

Draw Line#3 from point#1 to the dot with straight edge.
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PyroJoe
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### Re: Simple Cone Layouts

This should create a template (shown shaded) to construct the cone section.
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PyroJoe
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### Re: Simple Cone Layouts

Generally compass are to small to make these type arcs, so what I will do in a pinch, is take a thin piece of wood and drill a slightly undersized hole, then hammer a nail in one end.

Then drill 2 small holes to match the arc radius needed.

Looks something like this:
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WebPilot
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### Re: Simple Cone Layouts

1. the geometric construction of a truncated cone may be found in a sheet metal worker's handbook and
2. use ps as a drawing tool.

PyroJoe
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### Re: Simple Cone Layouts

This topic is generally dedicated to "simple" and "limited resources".
As a challenge can anyone provide a simpler solution with fewer resources?

Thinking about it, if the sheet metal was large enough, the paper could be omitted.

WebPilot
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### Re: Simple Cone Layouts

PyroJoe wrote:This topic is generally dedicated to "simple" and "limited resources".
Precisely why I chose and suggested PS.

PyroJoe
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### Re: Simple Cone Layouts

Ok for the sake of thoroughness, I'll bite.

PS is a acronym for?

WebPilot
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### Re: Simple Cone Layouts

We discussed it some 10 mos. ago in the thread, patterns.

This is ¼ size.

The "tools" are free and work on most OSes.

PyroJoe
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### Re: Simple Cone Layouts

Ah, PostScript
10 months ago, Iv'e slept at least twice since then, ha

I made a couple presumptions in the above that many folks don't own a computer or printer.

PyroJoe
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### Re: Simple Cone Layouts

Instead of constructing a compass, a tape measure can be used to measure off POINT #1 marking dots on the measure of ARC#1 and ARC#2. Just connect the dots and you have it.

hinote
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### Re: Simple Cone Layouts

http://www.i-logic.com/conecalc.htm

Also, a set of "trammels" is available from several sources such as this:

http://www.amazon.com/gp/product/B00004 ... CTBPJ6A7YW

I just clamp them to an aluminum ruler and adjust to size.

Hope this helps!

Bill