Bridging where there's not bridges
Posted by miro87043
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Bridging where there's not bridges December 27, 2011 01:12AM |
Registered: 12 years ago Posts: 77 |
Hello,
Here's what I got:
Sfact-Pronterface-Marlin-Ramps 1.4-SAE Prusa
Here's my issue:
Unless needed for strength, I try to print most parts with 0 fill or as little as possible to save time and material. However sfact seems to think there are bridges where there aren't. For example, I'm printing this, [www.thingiverse.com] with 0 fill and sfact is printing more than half of the layers as bridges. It seems to happen whenever there's overhangs and/or complex perimeters.
Is there a way to stop this?
Here's what I got:
Sfact-Pronterface-Marlin-Ramps 1.4-SAE Prusa
Here's my issue:
Unless needed for strength, I try to print most parts with 0 fill or as little as possible to save time and material. However sfact seems to think there are bridges where there aren't. For example, I'm printing this, [www.thingiverse.com] with 0 fill and sfact is printing more than half of the layers as bridges. It seems to happen whenever there's overhangs and/or complex perimeters.
Is there a way to stop this?
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Re: Bridging where there's not bridges December 27, 2011 02:01AM |
Registered: 13 years ago Posts: 581 |
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Re: Bridging where there's not bridges December 27, 2011 06:31AM |
Registered: 14 years ago Posts: 689 |
Bridges is hard to detect I hear. As far as I know in skeinforge a bridge layer is detected if any part of the current layer has a overhang of over 45 degrees compared to previous layer, if that makes any sense.
Slic3r does this better (in most cases), as it only fills in the area where the bridge is, and not the entire layer.
The yoda model is not easy to print with zero infill because the mesh is so dense and detailed it will detect a lot of bridges everywhere. You could get away with it if you print a lot of perimeters, but it might be just as fast to print 1-10% infill instead.
--
-Nudel
Blog with RepRap Comic
Slic3r does this better (in most cases), as it only fills in the area where the bridge is, and not the entire layer.
The yoda model is not easy to print with zero infill because the mesh is so dense and detailed it will detect a lot of bridges everywhere. You could get away with it if you print a lot of perimeters, but it might be just as fast to print 1-10% infill instead.
--
-Nudel
Blog with RepRap Comic
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Re: Bridging where there's not bridges December 28, 2011 01:00PM |
Registered: 12 years ago Posts: 411 |
Nudel Wrote:
-------------------------------------------------------
> Bridges is hard to detect I hear. As far as I know
> in skeinforge a bridge layer is detected if any
> part of the current layer has a overhang of over
> 45 degrees compared to previous layer, if that
> makes any sense.
>
> Slic3r does this better (in most cases), as it
> only fills in the area where the bridge is, and
> not the entire layer.
>
> The yoda model is not easy to print with zero
> infill because the mesh is so dense and detailed
> it will detect a lot of bridges everywhere. You
> could get away with it if you print a lot of
> perimeters, but it might be just as fast to print
> 1-10% infill instead.
I print Yoda with no infill using Slicer and get good results with 3 perimeters. The hardest part is the eyes because they're actually spheres that were added to the mesh. Thankfully, the mess it makes doing the bottoms of those spheres is hidden inside the model.
-------------------------------------------------------
> Bridges is hard to detect I hear. As far as I know
> in skeinforge a bridge layer is detected if any
> part of the current layer has a overhang of over
> 45 degrees compared to previous layer, if that
> makes any sense.
>
> Slic3r does this better (in most cases), as it
> only fills in the area where the bridge is, and
> not the entire layer.
>
> The yoda model is not easy to print with zero
> infill because the mesh is so dense and detailed
> it will detect a lot of bridges everywhere. You
> could get away with it if you print a lot of
> perimeters, but it might be just as fast to print
> 1-10% infill instead.
I print Yoda with no infill using Slicer and get good results with 3 perimeters. The hardest part is the eyes because they're actually spheres that were added to the mesh. Thankfully, the mess it makes doing the bottoms of those spheres is hidden inside the model.
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Re: Bridging where there's not bridges December 28, 2011 01:27PM |
Registered: 12 years ago Posts: 77 |
Andrew Diehl Wrote:
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> In regular skeinforge it's a setting called
> "infill in direction of bridge." Should be off.
I can't find that setting in sfact.
Pointedstick Wrote:
-------------------------------------------------------
> I print Yoda with no infill using Slicer and get
> good results with 3 perimeters. The hardest part
> is the eyes because they're actually spheres that
> were added to the mesh. Thankfully, the mess it
> makes doing the bottoms of those spheres is hidden
> inside the model.
I've just started experimenting with slic3r and so far I'm pleased with the results. I haven't tried yoda again, but I did half a brain (overhang city!) and slic3r didn't seem to bridge any layers.
-------------------------------------------------------
> In regular skeinforge it's a setting called
> "infill in direction of bridge." Should be off.
I can't find that setting in sfact.
Pointedstick Wrote:
-------------------------------------------------------
> I print Yoda with no infill using Slicer and get
> good results with 3 perimeters. The hardest part
> is the eyes because they're actually spheres that
> were added to the mesh. Thankfully, the mess it
> makes doing the bottoms of those spheres is hidden
> inside the model.
I've just started experimenting with slic3r and so far I'm pleased with the results. I haven't tried yoda again, but I did half a brain (overhang city!) and slic3r didn't seem to bridge any layers.
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