Next Questions

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M W
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Next Questions

M W
I've seen that various parts built have hexagonal "honeycomb" air spaces added inside, to save filament; If needed for a part like a servo mount, is there a way to disable this, or enable it for a part you want lighter?

Also, can you make a hings from thinning an ABS piece down, and if so, how thin / how durable is it? (I could always make a place for metal axle pins etc. if needed, just curious on this one.)

Thanks again,

  Mark


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Re: Next Questions

tjhowse
The plastic in the interior of the part, known as infill, is determined by the program used to process the model into machine code. This process is often referred to as "skeining" or "slicing" the model. This process has nothing to do with OpenSCAD. The most popular slicer for repraps these days is Slic3r.

In answer to your first question: Yes. If you set the infill ratio to 1, the part will be entirely solid. Most parts are printed with infill ratios of somewhere between 0.2 and 0.6.

In answer to your second: There are new experimental plastics coming out these days that use admixtures to alter the properties of the plastic, such as making them more tolerant to flexing. I'm pretty sure that ordinary ABS won't stand up to much flexing before failure, depending on how much flex is going on. There are designs that create hinges that have small local flex to give a large total flex, called "living hinges": http://www.thingiverse.com/thing:13255

On 3 May 2012 16:24, M W <[hidden email]> wrote:
I've seen that various parts built have hexagonal "honeycomb" air spaces added inside, to save filament; If needed for a part like a servo mount, is there a way to disable this, or enable it for a part you want lighter?

Also, can you make a hings from thinning an ABS piece down, and if so, how thin / how durable is it? (I could always make a place for metal axle pins etc. if needed, just curious on this one.)

Thanks again,

  Mark

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Re: Next Questions

Stuart Young
In reply to this post by M W

This is part of the slicing software (Skeinforge, Slic3r).

It is not mandated in the model of the object (STL) per se, so doesn't fall in the domain of OpenSCAD.

--
Cef

On May 3, 2012 4:24 PM, "M W" <[hidden email]> wrote:
I've seen that various parts built have hexagonal "honeycomb" air spaces added inside, to save filament; If needed for a part like a servo mount, is there a way to disable this, or enable it for a part you want lighter?

Also, can you make a hings from thinning an ABS piece down, and if so, how thin / how durable is it? (I could always make a place for metal axle pins etc. if needed, just curious on this one.)

Thanks again,

  Mark

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Re: Next Questions

Whosawhatsis
The exception is that there are some hacks involving putting very small holes in a model to force the slicer to put more plastic in those areas (because it has to outline all of those holes) rather than just filling it with the sparse infill.

On Thursday, May 3, 2012 at 12:11 AM, Stuart Young wrote:

This is part of the slicing software (Skeinforge, Slic3r).

It is not mandated in the model of the object (STL) per se, so doesn't fall in the domain of OpenSCAD.

--
Cef

On May 3, 2012 4:24 PM, "M W" <[hidden email]> wrote:
I've seen that various parts built have hexagonal "honeycomb" air spaces added inside, to save filament; If needed for a part like a servo mount, is there a way to disable this, or enable it for a part you want lighter?

Also, can you make a hings from thinning an ABS piece down, and if so, how thin / how durable is it? (I could always make a place for metal axle pins etc. if needed, just curious on this one.)

Thanks again,

  Mark

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[hidden email]
http://rocklinux.net/mailman/listinfo/openscad
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M W
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Re: Next Questions

M W
OK, TYVM tj, Stuart, Who; I guess I'd just tell the guy who owns the printer to set infill appropriately :) Living Hinges look interesting, creative thought going on there! I need to get income going and get my own 3d printer :)

  Mark