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Reply To: Dhow Overhang Issue

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Avatarjason.surratt
Participant

I have an Ender 3 pro I’m having the exact same issue. I did a print last night that looks very similar to yours.

This morning I cropped down the ship to a 1″ x 3/4″ section of the siding and I’ve been toying with quick test prints today. After a half dozen prints, I think this is a fundamental issue with the model and not an issue with the slicing. If you look at the attached image (taken from the Dhow page) you can see the same overhang loop issues in the model on the store page.

I also included an image of the cropped down Dhow model in Cura. You can see how some of the board sections are completely unsupported and will clearly create the overhang looping if printed w/o generated supports.

I tried printing using PrusaSlicer on my Ender 3. My first time using PrusaSlicer, so I’m sure a veteran could do way better. Regardless, the overhang looping was better than my first Cura attempt but still really bad.

I did find that if I enable Custom print settings in Cura, then enable “Experimental -> Make Overhang Printable” and set “Experimental -> Maximum Model Angle” to 50deg, it nearly eliminates the overhang loops. Unfortunately, you lose some of the details in the boards and it introduces some ugly diagonal lines. Still better than the excessive overhang looping, in my opinion.

Some notes on my image:
* I sprayed the black model with a little grey primer to make it a little easier to see the details.
* The model is about 1cm tall
* Printed w/ a bunch of custom settings in Cura, but the layer height is .16mm. Cura Profile attached. (Whoops, .curaprofile uploads aren’t allowed, here is a Google Drive link: https://drive.google.com/open?id=1xcbTC8YfdpYY198ZoDrh2qYRgejLU3ff)
* I’m using Cura 3.6.0 (haven’t bothered to upgrade yet)

I’m curious if there is some tool out there than can fill in some of the deep grooves between boards in the model. I didn’t see anything obvious in MeshMixer but I’ll look at blender next.

I’d love to print a bunch of these boats, but really don’t want to sand each one to remove this overhang looping. Any ideas are very welcome.

Thanks!

  • This reply was modified 3 years, 1 month ago by Avatarjason.surratt. Reason: Added Google Drive Link
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