bubnikv
commented
7 years ago What 3D printer is it printed on? What material? Is it PET?
It seems to me like your printer / print material does not like the rapid changes in extrusion rate caused by the gap fill.
On Tue, Aug 8, 2017 at 12:56 PM, ReflectorL notifications@github.com wrote:
Version
1.36.0 Operating system type + version
Win7/64, run inside of Sandboxie. Behavior
-
Describe the problem When models have vertical walls of 0.8mm thickness with a 0.4mm nozzle, the gcode seems to call for the printer to do some kind of reduced extrusion rate (Like as if it was trying to coast) towards the end of a layer, consistently in the same spot which causes a weakened wall. This behavior does not appear to manifest when wall thickness is 1.2mm. It does not appear to be an underextrusion problem as the rest of the print will be fine otherwise. This consistently creates weak walls with "pitting" that is actually caused by an extrusion that appears to be like a thin wisp followed by a blob and thin wisp, repeating. It appears to occur even with layer thickness set to .15 instead of .3. It consistently occurs at the same part of a model. On tall models that have vertical walls, this appears to occasionally change parts on the model instead of propagating straight up (Ex: From the "front right" of a model to the "rear left") every so many layers (Measurably >1-2cm sections, but less than say, 5cm), as long as seam alignment is set to nearest.
Steps needed to reproduce the problem Seam set to nearest
Expected Results [image: expected solid wall] https://user-images.githubusercontent.com/30828370/29068484-e3bbaed4-7beb-11e7-8c38-42c8a39a80cd.jpg
Actual Results See right [image: weird seam] https://user-images.githubusercontent.com/30828370/29068467-cd2f1c1e-7beb-11e7-8b01-ea47e90d27a2.jpg
Is this a new feature request? No STL/Config (.ZIP) where problem occurs
config.zip https://github.com/prusa3d/Slic3r/files/1207711/config.zip Battery Case Bottom.zip https://github.com/prusa3d/Slic3r/files/1207713/Battery.Case.Bottom.zip
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ReflectorL
Version
1.36.0
Operating system type + version
Win7/64, run inside of Sandboxie.
Behavior
Describe the problem When models have vertical walls of 0.8mm thickness with a 0.4mm nozzle, the gcode seems to call for the printer to do some kind of reduced extrusion rate (Like as if it was trying to coast) towards the end of a layer, consistently in the same spot which causes a weakened wall. This behavior does not appear to manifest when wall thickness is 1.2mm. It does not appear to be an underextrusion problem as the rest of the print will be fine otherwise. This consistently creates weak walls with "pitting" that is actually caused by an extrusion that appears to be like a thin wisp followed by a blob and thin wisp, repeating. It appears to occur even with layer thickness set to .15 instead of .3. It consistently occurs at the same part of a model. On tall models that have vertical walls, this appears to occasionally change parts on the model instead of propagating straight up (Ex: From the "front right" of a model to the "rear left") every so many layers (Measurably >1-2cm sections, but less than say, 5cm), as long as seam alignment is set to nearest.
Steps needed to reproduce the problem Seam set to nearest
Expected Results
Actual Results See right
Is this a new feature request? No
STL/Config (.ZIP) where problem occurs
config.zip Battery Case Bottom.zip