How to get a flat surface on top support ?
 
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How to get a flat surface on top support ?  

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waxwolf69
(@waxwolf69)
Utenti
How to get a flat surface on top support ?

Hello all. I try to get  a flat surface on to of my support  (picture) 

Inside of my cap. You can see  filament, i would like this surface be  flat after  i remove the support. It is possible ?

Thx

Questa discussione è stata modificata 2 days fa da JoanTabb
Postato : 12/01/2026 6:53 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: How to get a flat surface on top support ?

No Photo Waxwolf!

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

Postato : 12/01/2026 9:47 pm
waxwolf69
(@waxwolf69)
Utenti
Topic starter answered:
RE: How to get a flat surface on top support ?

Sorry  picture was not upload correctly 

 

Postato : 12/01/2026 10:02 pm
Jürgen
(@jurgen-7)
Noble Member
RE: How to get a flat surface on top support ?

The photo attachment still did not work. For me, the "Add Media" button (above the formatting buttons of the editor window) is the only option that inserts images reliably. It's a two-step process, upload the image and then insert it into the post. 

Postato : 13/01/2026 5:31 am
Mike B
(@mike-b-3)
Estimable Member
RE: How to get a flat surface on top support ?

I can see the photos.

Surfaces above support will always be rougher, although you should be able to do better than that.  Given the size of that part, you might want to try without supports and see if the bridging does better...

Or, try selecting "Top Contact Z Distance" = "0.1 (Detachable)" under the supports settings (in Advanced mode in PrusaSlicer), although you will want to remove the supports soon after printing because they will be more attached to the part.

Also, you can look into printing PLA supports for PETG (or PETG supports for PLA) objects - it's difficult but provides amazing results.  This model has pointers to the method: https://www.printables.com/model/829946-mmu-loading-fork

Prusa MK4 since Jan 2024, Printables: @MikeB_1505898

Postato : 13/01/2026 6:13 am
Jürgen
(@jurgen-7)
Noble Member
RE: How to get a flat surface on top support ?
Posted by: @mike-b-3

I can see the photos.

How strange... still nothing for me, neither in the original post nor the follow-up, no matter which browser or device I use. Maybe some synchronization issues between different Prusa servers? This forum platform is broken, unfortunately.

Postato : 13/01/2026 6:29 am
waxwolf69
(@waxwolf69)
Utenti
Topic starter answered:
RE: How to get a flat surface on top support ?

Postato : 13/01/2026 6:35 pm
Mike B
(@mike-b-3)
Estimable Member
RE: How to get a flat surface on top support ?

Now I see the third picture, but not the first two!  That IS weird...

Prusa MK4 since Jan 2024, Printables: @MikeB_1505898

Postato : 13/01/2026 9:33 pm
waxwolf69
(@waxwolf69)
Utenti
Topic starter answered:
RE: How to get a flat surface on top support ?

Postato : 13/01/2026 10:39 pm
Jürgen
(@jurgen-7)
Noble Member
RE: How to get a flat surface on top support ?

The cause for the different appearance is (of course) that the filament is printed in mid-air there, not squished flat against the print bed. You can probably improve the surface a bit by reducing the Top contact Z distance and the Interface pattern spacing, both under Print settings > Support material in PrusaSlicer. But that will make the supports harder to remove and will still not give the same smooth appearance as on the other print surfaces.

If you need good-looking surfaces on both sides of the print, it might be best to print a small circular insert separately and glue it into the recess.

Postato : 14/01/2026 12:21 pm
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