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Support generated even if support on build only activated #915

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kakou-fr opened this issue May 23, 2018 · 6 comments
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Support generated even if support on build only activated #915

kakou-fr opened this issue May 23, 2018 · 6 comments
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supports

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@kakou-fr
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kakou-fr commented May 23, 2018 •
edited

Version

slic3r-1.40.0-alpha1+

Operating system type + version

OS X 10.13.4

Behavior

Slic3r generate strange support in this hole, even if support on build only activated.

Expected behaviour : support only on build plate

STL/Config (.ZIP) where problem occurs

slic3r-3

slic3r-2

slic3r-1
@3Delights
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I think the supports system is in need of a major rewrite!

@chadwixk
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chadwixk commented Jun 5, 2018 •
edited

Same issue on windows version 1.40.0-b. But this was also an issue on 1.38.4. Even though Support on build plate only is selected, it is producing support on the object itself.

support on object
support on build plate only setting

@aaronevers
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aaronevers commented Jun 14, 2018 •
edited

I see this too.
slice
thistle.zip
config.zip

Windows 7
Slic3r 1.40.0+win64,

@gromain
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Same problem seen here as well, when slicing a simple sphere with a cut on the bottom (as an example).

image
Support on build plate only is selected, and I see two problems:

  • Useless support is generated (See the part on the right, goes at an angle then stop)
  • Support material is generated above sliced part inside the sphere

support_test_0.2mm_PLA_MK3.amf.zip

Linux with Slic3r PE 1.41.0+linux64 from AppImage

@scheric scheric mentioned this issue Jul 25, 2019
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@bubnikv
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With the current master

image
image

however some of the support towers trimmed to not land on object's top surface may not be stable.

This was referenced Mar 18, 2021
Closed
Closed
bubnikv added a commit that referenced this issue Mar 19, 2021
@bubnikv
Refactoring of FDM support generator:
9f09f03 
1) If "support on build plate only" is enabled, the support columns are
   newly trimmed to not land on top of an object. However this may make
   the column too small to be stable.
2) Support enforcers newly take precedence over "supports on build plate only"
   and over "don't support bridges".
3) Some refactoring of the support generator code for clarity: Reduced
   some of the worst spagetti offenders.

Fixes Support generated even if support on build only activated #915
Fixes Bug: supports on build plate only #1340
Fixes Bottom interface layer is not generated , support on build plate only. (long open defect) #4199
Fixes option "supports on build plate only" does not work #3980

Fixes No support interface layers generated #1997
Fixes Feature Request: Option to combine results of 'support from build plate only' and 'support enforcers only' #2801
Fixes Support interface isn't generated: build plate only + blocked by model + support enforcer #3831
Fixes Support Enforcer don't create interface layers #5748
Fixes Support Enforcers Don't Have Top Loops/Raft #1870
Fixes Don't cancel support enforcers with "don't support bridges" #5105
@bubnikv
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Fixed with 9f09f03

@bubnikv bubnikv mentioned this issue Aug 6, 2021
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@gromain @chadwixk @bubnikv @aaronevers @kakou-fr @3Delights