[FR] Import brim "ears" from Slic3r

[pscrespo]

Version

2.1.0

Is this a new feature request?
Yes.

Is it possible to add brim "ear" feature like the one present in Slic3r? It would help with some ("pointy"? 😅 ) 3D models.

More info:
Issue: slic3r/Slic3r#4687
PR: slic3r/Slic3r#4691

[Jebtrix]

Current workaround using modifiers: #2680

[imro2]

Current workaround using modifiers: #2680

I just spent hours banging my head, trying to reproduce this, but was not having any luck. Turns out, this workaround does not work if the Elephant foot compensation under Print Settings -> advanced is not set to 0. Hope that helps somebody else.

I hope the merge request will be implemented soon, so we don't have to monkey with workarounds.

[dattrax]

Seems like the SuperSlicer fork has this feature. Any chance we can get it into PrusaSlicer?

[bubnikv]

Seems like the SuperSlicer fork has this feature. Any chance we can get it into PrusaSlicer?

One day.

[sarvenn]

I tried prusal slicer rc3 but I still can not see brim tab(ear) function which is available in Slic3r and Cura. I wish new v2.3 prusaslicer had it either.

[4wrxb]

This was pretty high in my google search so updating the suggestion from here:

Current workaround using modifiers: #2680

If you create an object as mentioned the slicer in 2.3.1 gives an error that an object has no extrusions on the first layer. I have posted a work-around in the issue there as it does not seem to be demoted to a warning #4062

[imro2]

I tested it the old way and even though it shows the error, it seems to slice ok.

EDIT: Never mind, the error will prevent exporting the gcode.

[imro2]

Turns out that you can work around this limitation by adding a modifier and overriding the no bottom/top layers and perimeters. As long as it prints a single dot, it is going to pass the test. So the steps to get this working:

1. make sure elephant foot compensation is turned off. (Print Settings -> Advanced -> Elephant foot compensation - set to 0)
2. load your stl
3. Right click on the build plate and Add Shape (box or cylinder depending on your needs)
4. select the newly added object and under Object manipulation click the pad lock to disable proportional scaling
5. set the z size to the height of your first layer
6. move the object in place.
7. Right click the newly created object and select Layers and Perimeters, this will add Object Settings to Modify to your right pane.
8. Set Bottom, Perimeters, Top to 0
9. Right click the object again and select Infill
10. Set Fill density to 0 <--------- Up to here are the old steps
11. Right click the object again and select Add Modifier -> Cylinder
12. Scale down the Cylinder to 1 x 1 x 1 and move it into place. Make sure it overlaps with at leas a part of your add object
13. Right click the modifier and select Layers and Perimeters
14. Set the Perimeters in Part Settings to Modify / Layers and Perimeters in the right pane to 1

In the example below, the black box is your stl. Orange is the added object set to first layer height and positioned. Green is the modifier for your added object.

If you need more than one of these, just select the object, CTRL+C, CTRL+P

[4wrxb]

Your notes provide a similar set-up (with more detailed instructions). It sounds like the modifier cylinder works "inside" the keep-out object where the grouped object had to be outside the volume to work so that's easier to deal with.

[sanchosk]

12. Scale down the Cylinder to 1 x 1 x 1 and move it into place. Make sure it overlaps with at leas a part of your add object

Make sure that after the scale down, the modifier SITS ON THE BUILD PLATE! Mine was, for some reason, few mm up, so even though I added the modifier, there was no real intersection with the added 1-layer cylinder. Moving it down manually and voila - I have my fake elephant ears :)
Still, it would be great to have the elephant ears functionality similar to Cura...

[sanchosk]

Is there a way how I can sponsor adding this feature to PrusaSlicer? I believe it would be very beneficial for people without heated bed and, in some cases, also for people with heated bed but with difficult models.

[Eldenroot]

Bump this... I have to use Cura for this particular feature (only for specific models)... quite annoying. Please add it into Pusa slicer (or at least port it from Slicer)

[redPanther]

Current workaround using modifiers: #2680

I just spent hours banging my head, trying to reproduce this, but was not having any luck. Turns out, this workaround does not work if the Elephant foot compensation under Print Settings -> advanced is not set to 0. Hope that helps somebody else.

I hope the merge request will be implemented soon, so we don't have to monkey with workarounds.

this feels not like a workaround. it feels like it is working due to a bug. Very anoying and I understand brim is low prio, but since superslicer implemented this and both slicer had same/similar base it would be nice if a developer could take some days to port this into prusaslicer.

currently I want to have a textured finish on the first layer (will be top of my model) and therefore I need to use the textured bed. Unfortunately PLA doesn't adhere so good. I use 3DLAC and it work quite well, but thin corners need brim support.

[lorenzofanchi]

+1 Would be great to see this in PrusaSlicer. One of the reasons I still use SuperSlicer these days.

[wikolii]

Please, pretty please add this to PS

[tk-notify]

Would be great to have the brim ear option. The mentioned work arounds are not working for me. Looking forward to an implementation.
Thanks!

[pscrespo]

Hi! I've seen on duplicated issues that SuperSlicer implemented this feature, and I found the following related commits:

supermerill@b1b76c0
supermerill@3ec2f07
supermerill@d4fe1e5
supermerill@1ed31fc

Hope this helps. Sadly I'm not a programmer so I can't help implementing it.

[Snuff1eupagus]

Maybe this will help some of you to achieve your goals with Brims in PrusaSlicer

Selective Blocking
https://www.youtube.com/watch?v=6CRqNk_JUj4

Selective Adding
https://www.youtube.com/watch?v=dhsbMmosbLU&t=1s

Regards