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Topic: Different density in an object.

How can you create areas that are completely covered in an object where a screw should go through and have only honnig grid places where strength should be less, I use Sketcup ...

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Re: Different density in an object.

No offense but throw away sketchup and get blender

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Re: Different density in an object.

Ohh, its is not in SketchUp i meen(i am just usint it),, the object is made, but then i slice it, i can see honnycone grit , but if i wantet a piece of the object filled up abd the rest whit gitter, how doe one do that, can i set it in ths slicer or do the object have to be design to that situation.

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Re: Different density in an object.

Thats infill settings. 100%=solid object
Play with that.

Preview layers to see the effect before you print.

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Re: Different density in an object.

You can make a hole that is very tiny, like .5mm.  It will never manage to print an open hole that small, but it will do a bunch of perimeters around it creating a solid spot among the infill.  You could distribute those holes around areas that might need to be stronger.  They don't even need to pass all the way through the object, they could be in the middle, creating a solid pocket with infill above or below.

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Re: Different density in an object.

IanJohnson wrote:

You can make a hole that is very tiny, like .5mm.  It will never manage to print an open hole that small, but it will do a bunch of perimeters around it creating a solid spot among the infill.  You could distribute those holes around areas that might need to be stronger.  They don't even need to pass all the way through the object, they could be in the middle, creating a solid pocket with infill above or below.

+1 Cool tip, thanks Ian!

SD3. Mk2b + glass, heated enclosure, GT2 belts, direct drive y shaft, linear bearings, bowden-feed E3D v5 w/ 0.9° stepper
Smoothieboard via Octoprint on RPi

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Re: Different density in an object.

Thx,, it will take alot of thinking when designing a object :-)

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Re: Different density in an object.

TommyF wrote:

Thx,, it will take alot of thinking when designing a object :-)

It's a large part of the fun & sense of achievement, a well-designed part that prints well and works with minimal finishing! smile

SD3. Mk2b + glass, heated enclosure, GT2 belts, direct drive y shaft, linear bearings, bowden-feed E3D v5 w/ 0.9° stepper
Smoothieboard via Octoprint on RPi

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Re: Different density in an object.

I've thought about this before - selecting and changing the infill density for different regions of a part.  This would certainly be an appreciated feature in my book.  Hopefully someone around Slic3r or Simplify3D is listening...

SD3, RUMBA, 360W power, ABS: Glass bed + Aquanet Extra Super Hold Hairspray, Anti-backlash Z spanner, Repetier Host + Slic3r

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Re: Different density in an object.

Not specifically in different portions of the object, but in Simplify3D you can add several processes to objects.

for example layer 0-100 10% infill+ 1 perimeter, layer 101-200 100% infill +2 perimeters, layer 201 to end+5 perimeters etc..
processes can control everything, so you can have printspeed, layerthickness, temps etc different in several parts of the object.

But no left,right etc parts.. just in z.

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Re: Different density in an object.

I have tried dif infil patterns and change percentage infil. found best strength from Honeycomb flow set half as thin as perimeters and spacing about 2x perm then 30% fill max 70% very solid. its like spokes or aircraft frames. also lay object flat on side needing most linear strength in horizontal plane when printing. also support material can be thinned same way to ease removal

Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs

12 (edited by megmaltese 2014-10-19 14:57:16)

Re: Different density in an object.

Another idea could be... just add solid boxes around the area that you want to reinforce?
I mean, straight INSIDE the original model.
Surely not high class involved in the solution, but very quick and effective big_smile

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Re: Different density in an object.

Perhaps :-))   i still awaiting the press, so its all new to me...

14 (edited by jagowilson 2014-10-23 19:10:14)

Re: Different density in an object.

If you want to do this regularly get a slicer like Simplify3D. It's not free, but it's not expensive and it's awesome. You can change every single parameter based on layer ranges. Not sure if slic3r has this ability but if slic3r had this and supports as good as S3D I'd just use slic3r.

Edit: someone beat me to it. It's a good tool to have in your arsenal. Strongly consider it.