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alexoxo
(@alexoxo)
New Member
SUPPORT LAYER STICKED TO MODEL

What settings do I have to change in order to get rid of this annoying results of not being able to detach properly the support layer?

 The side which is not facing the bed comes out nice and smooth while the side facing the supports comes out really bad

 

Posted : 03/03/2025 12:13 pm
Neophyl
(@neophyl)
Illustrious Member
RE: SUPPORT LAYER STICKED TO MODEL

That doesn't look like stuck on support layer to me.  That looks like the actual bottom layer you get when you print on top of support.  Printing the same filament for the support interface and the model means there's always a gap required.  No gap and your support basically welds to the model, gap and the layers printed above it cant be squished onto the support so are always loose like that.  That's essentially normal for printing on support without a multi-material setup.

Posted : 03/03/2025 12:54 pm
1 people liked
alexoxo
(@alexoxo)
New Member
Topic starter answered:
RE: SUPPORT LAYER STICKED TO MODEL

So there is not a way to make these layers that are built on top of support to look better?

Posted : 03/03/2025 1:01 pm
AnnieR
(@annier)
Reputable Member
RE: SUPPORT LAYER STICKED TO MODEL

I hear you. 

I've never been able to get a totally smooth finish on top of a support, even a very flat one. 

Posted : 03/03/2025 2:03 pm
1 people liked
Neophyl
(@neophyl)
Illustrious Member
RE: SUPPORT LAYER STICKED TO MODEL

Well you can get a printer that supports multi material and then print the support interface in a different material that doesn't stick well to your main print material.  You can then have a zero size gap and get better layers.  Other than that, then not really.

Its why design for 3d print as a production medium is so important, the idea is to reduce/eliminate areas that need support.  Sometimes its better to split a model into parts and then join later if looks are critical.  Or you hide those areas where they wont be seen.  It is completely geometry dependent of course if that's even possible to do.

Cant tell from your pics if there's a specific reason why those areas are raised above the bed and that they have to be ?

Posted by: @alexoxo

So there is not a way to make these layers that are built on top of support to look better?

 

Posted : 03/03/2025 5:34 pm
2 people liked
FoxRun3D
(@foxrun3d)
Illustrious Member
RE:

This looks actually not too bad. It's just a horrible model to print on an FDM printer without soluble supports or supports made from a different material (even then I wouldn't expect the bottom surfaces to look squeaky clean).

Formerly known on this forum as @fuchsr -- https://foxrun3d.com/

Posted : 03/03/2025 10:13 pm
alexoxo
(@alexoxo)
New Member
Topic starter answered:
RE: SUPPORT LAYER STICKED TO MODEL

So if you would use two different filaments which one would you choose?

Yes they are surfaces on different levels and I wanted to give it a shoot and try printing it without having to cut it in many pieces and then glue them

Posted : 04/03/2025 4:52 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE:

i Have used PLA as the interface layer on  PETG Models. and
BVOH as the interface layer on PETG models BVOH Is much more expensive

you have to use plenty of Purge, in a single extruder printer otherwise the filaments contaminate each other, leading to poor inter layer bonding.

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility.Location Halifax UK

Posted : 04/03/2025 5:09 pm
1 people liked
FoxRun3D
(@foxrun3d)
Illustrious Member
RE: SUPPORT LAYER STICKED TO MODEL

If the main model is PLA, PETG is fine. On a flat model like this, a PETG  interface on PLA supports should work. Or full PETG supports. 

Here's an interesting analysis of material combos

https://toms3d.org/2024/12/06/try-these-filament-combinations-for-multi-material-and-supports/

Formerly known on this forum as @fuchsr -- https://foxrun3d.com/

Posted : 04/03/2025 6:45 pm
1 people liked
strjan
(@strjan)
Estimable Member
RE: SUPPORT LAYER STICKED TO MODEL

What you can try is a trick with permanent marker.

In the slicer, select the layer, which is the last on the supports and insert pause in the G-code. When the pause is reached, paint the top layer of supports with permanent marker and continue the print.

Posted : 05/03/2025 4:32 pm
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