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The red areas would normally indicate overhanging geometry that needs supports. In this case it looks like the surface normals are inconsistent, which breaks the visualisation of overhangs.
The model likely doesn’t slice as expected because it has small holes or internal geometry. The model needs to be “repaired” before it can be sliced correctly.
You could also experiment with the 8 options in the "mesh fixes" section. In particular uncheck "merge overlapping volumes". That might make it even worse though. But try that.
The best solution is to not create these errors in CAD in the first place. 99% of cad software out there will not let you create these errors - it's impossible.
A "normal" as ahoeben calls it indicates which side of each triangle in the STL file is facing "air" and which side faces "internal". Many cad programes (like sketchup) make the user set this value manually. It's very easy to fix in sketchup.
@gr5 I used blender to adapt it. @ahoeben mentioned normals and I checked them out in the blender documentation. I didn't know that each face has a direction. The problem was easily fixed by pressing ctrl+N (in blender edit mode) which recalculates the normals.
Thanks for your fast and helpful replies.
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In this stable release, Cura 5.3 achieves yet another huge leap forward in 3D printing thanks to material interlocking! As well as introducing an expanded recommended print settings menu and lots of print quality improvements. Not to mention, a whole bunch of new printer profiles for non-UltiMaker printers!
The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
So what’s new?
The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
The UltiMaker S7 also includes quality of life improvements:
Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more
Curious to see the S7 in action?
We’re hosting a free tech demo on February 7.
It will be live and you can ask any questions to our CTO, Miguel Calvo.
Register here for the Webinar
Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.
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ahoeben 1,767
The red areas would normally indicate overhanging geometry that needs supports. In this case it looks like the surface normals are inconsistent, which breaks the visualisation of overhangs.
The model likely doesn’t slice as expected because it has small holes or internal geometry. The model needs to be “repaired” before it can be sliced correctly.
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gr5 2,005
@raldone01 - what cad software did you use to create this? If it was sketchup I can help you out.
The quickest thing to do is "fix" the model with netfabb.
netfabb free repair service is here (you have to create a free account first):
https://service.netfabb.com/login.php
You could also experiment with the 8 options in the "mesh fixes" section. In particular uncheck "merge overlapping volumes". That might make it even worse though. But try that.
The best solution is to not create these errors in CAD in the first place. 99% of cad software out there will not let you create these errors - it's impossible.
A "normal" as ahoeben calls it indicates which side of each triangle in the STL file is facing "air" and which side faces "internal". Many cad programes (like sketchup) make the user set this value manually. It's very easy to fix in sketchup.
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raldone01 0
@gr5 I used blender to adapt it. @ahoeben mentioned normals and I checked them out in the blender documentation. I didn't know that each face has a direction. The problem was easily fixed by pressing ctrl+N (in blender edit mode) which recalculates the normals.
Thanks for your fast and helpful replies.
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