geraldtrost
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Posts posted by geraldtrost
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right, smart overhang adaption could only work
for small overhangs, let us say <= 3mm.
but tiny overhangs happen frequently in mechanical models.
to my second proposal (smart overhang infill)
yes, infilling the overhang portion inside-out implies that
some circular or concentric infill pattern would be used.
thanks for your attention!
Gerald
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Hi developers!
slicing overhangs is still a huge issue, even in modern slicers!
Very often we would be able to skip the annoying support
material if only - if only the slicers were smart enough!
Why build a perimeter (shell) in the open air
so that the material all
falls down (driven by gravity)?
THIS IS A REQUEST for an additional expert setting named
"use smart overhang slicing"
Description for the desired feature:
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Improvement A
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The smart overhang slicer should slightly adapt some (up to 3) layers
below and above the currently sliced layer as shown in the figures:
fig 1: front view of the print model
xxxxxxxxxxxxxxxxxxxxxxxxx <- layer +3
xxxxxxxxxxxxxxxxxxxxxxxxx <- layer +2
xxxxxxxxxxxxxxxxxxxxxxxxx <- layer +1
xxxxx <- layer 0 (currently sliced)
xxxxx <- layer -1
xxxxx <- layer -2
xxxxx <- layer -3
xxxxx
fig 2: front view of the adapted print model
xxxxxxxxxxxxxxxxxxxxxxxxx <- layer +3
xxxxxxxxxxxxxxxxxxxxx <- layer +2
xxxxxxxxxxxxxxxxx <- layer +1
xxxxxxxxxxxxx <- layer 0 (currently sliced)
xxxxxxxxx <- layer -1
xxxxx <- layer -2
xxxxx <- layer -3
xxxxx
Layers +1,+2,+3 become slightly cut while layers -1,-2,-3 become slightly extended.
This is done by "secretly" adapting 3 already sliced layers and by "secretly" adapting 3 "next to come" layers.
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Improvement B
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The smart ovehang slicer should first build the overhang infill
in direction INSIDE-OUT and then it should build the overhang
shell upon the cooled infill matter.
This also implies that the infill/shell overlap setting should
be increased for the overhang portion.
This also implies that the infill speed should be decreased for the
overhang portion.
Remark:
Even if this method neglectibly distorts the model I would ALWAYS
prefer this option over using a support material!
yours, Gerald Trost
PS: please, forward this request to the development team.
hangovers and bridges
in Improve your 3D prints
Posted
Hi all!
I am rather disappointed because the cura slicer does not look ahead, as it seems.
There could be some quite effective tricks to build overhangs and bridges
if only the slicer would look some layers ahead.
ideas:
- print the overhang from inside to outside
(the overhang starts with a "shell" at its bottom, this is
100% filled. if printed from inside to outside then the
overhang would come out much better -
but the slicer would have to make localized decisions
about what is the local inner side and what is the
local outer side)
- print small partly supports below the bridge and
below the overhang
these tiny supports would then be built like a small
overhang and it would start some 10 layers below
these local supports would not reach out for the
entire width of the bridge but for about more than
half of its spread - maybe one third at the right
post and one third at the left post.
the slicer would then look some layers ahead ...
is there already a branch of cura that implements
these ideas ?
thanks
Gerald