Can anyone tell me what is causing this defect on all top fillet edges? One of my first designs I used autocad inventor
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The picture is a bit tough to get a good perspective, however I would venture to say your wall thickness is too thin. With that deep of a fillet, you could be running on top of infill for part of it. Try increasing the thickness by 2-3.
Hope this helps and let us know what happened…
I think this is the issue you have. You need to make it like the one on the right.
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Ok I will give it a try thank you
I’m really not even sure how to do that I’m new to this one of my first trys at designing . I am using autocad inventor
What shahramrobotics is showing is a 45 degree chamfer. Anytime overhangs are over 45 degrees, you should use supports, higher wall thickness or both.
As stated earlier, the picture you provided isn’t very detailed so it’s tough to determine if you were showing the heatbed side or not.
If you’re not set on using a filet, the chamfer will help. Otherwise supports may be needed.
Can I send u the cad file for you to take a look. Don’t want you to do any work on it just tell me what you think needs to be done
I use Fusion360 and I’m not sure how the CAD file will translate into it. But I don’t mind taking a look at it and seeing what I can figure out for you. Just link the file to the thread and I will download it.
(sorry, I’m not able to provide a way to send it directly to me)
Be easy on me lol I’m sure you will find a bunch of flaws first time designing
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Thank you sir I really appreciate it I will mess with it the next couple days and let you know how it turns out
Ok, after looking at it, you have a few options. Due to what this is being used for, the interior filet elements shouldn’t change. The rest of the changes are up to you and how you want to print it.
Option 1: Remove all exterior filet elements and change them to chamfer. This will eliminate the overhang issue and you should not have any problems printing with the face down.
Option 2: Reduce the exterior filet elements so that you get to the correct overhang angle sooner. Maybe reduce the exterior filet elements to 5mm instead of 10mm. You will still have issues with the print for a couple layers, but it should look much better.
Option 3: Leave it as is and add supports. Not a bad option, just adds some post-processing time to the print job.
Option 4: Flip the model 180 degrees on the X axis and add supports. This definitely is an acceptable option. If I were to get this in my Hub, I would print it face up and do the post processing work. The interior is not going to be visible once its attached to the device and as long as the post-processing work is done correctly, there shouldn’t be any problems with fit.
Hope that helps
Glad I could help. As you progress in making your own designs for 3D Printing, you will learn where to use filets, chamfers and how overhangs are handled. Basic rule is to keep overhang angles at 45 degrees are less for FDM printing with a single extruder.
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You should increase the Wall thickness up to 1,2 or 1.6mm minimum!
Printed perfect face up with supports . Thank you very much sir
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Thanks for the follow up, glad to hear you got a good print. Always feel free to ask questions… its usually the less painful way to learn. 
I think you printet it with the back (at your picture is it on top) on the plate. Thats fine, but the design has then an overhang of the corner, which your printer does´nt like. Make another 3D-design or print it with supports.
https://innovationstation.utexas.edu/tip-design/
