Impossible to print overhangs on new sv08

Sovol SV08
1

Hi all,
I recently bought some sovol printers and i’m having an issue with my new SV08.
As part of my calibration process the first thing i do is print an temperature tower generated by orcaslicer using the default sovol profiles.

This is the result i’m getting.

20250421_135033
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The included bench also has the same issue.

I’ve tried multiple different pla/petg (from different brands) and the issues keeps the same, as soon as there is an overhang.
If i print something without overhangs/bridges it prints perfectly so i’m totally baffled with this issue

Already tried the following:

Any help would be greatly appreciated!

2

Are you using the Orca profiles from Sovol, and the correct nozzle size? It’s almost like it’s over extruding. Is your outside wall width set correct? Especially on the left side, there shouldn’t be strings that long hanging down. But other areas as you said look fine. I’m interested to know what you find. What do your top layers look like?

3

Does the part cooling fan blow at all? Command 100% fan and feel for airflow

4

It almost looks as if plastic is “spraying” out of the nozzle not oozing. To bridge, the plastic has to form a tidy “strand” that is immediately pulled 90° to the side.

Try a different nozzle.

5

Hi all,
Thx for the replies.

  • Both fans are working.
  • I’m using the stock nozzle the printer came by, i checked it on the printer and its a 0.4 mm
  • Orca profiles are from sovol

I think the wall settings are correct

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Top layers look normal, flow rate pass1 calibration test went without issues.

Just did a first layer test which was also perfect.

I’ll tinker some more with the settings and as a last resort i will swap out the nozzle.

Thx
Bart

6

The widths looks right to me. If the flow test came out good and the tops look good it’s not over extrusion but it certainly looks like it on the overhangs. It’s just odd that the sagging plastic on the left side is so long. You could try turning your part fan off. If it’s too high the air flow can put too much pressure on the bridge and make it sag or just blow it all over the place. I find it’s a pretty fine line between too much and too little

7

With défaut settings without any modification, that should not be so bad. My only idea is a trouble with the extrusion :

  • where did you put the spool? May you send a global picture of the printer?
  • that is easy to insert/remove the filament (manually)? That should be very smooth, any tension will generate something like that (mix of under/over extrusion)
  • after a print of more than 30min, how is the extruder? Very hot? What happening if just after the print, you trying to extrude 5/10 cm of filament at 5 mm/s, and at 15mm/s ? Any noise? The extrusion is clean?
8

Did by any means the ntc on the hot-end get dislocated from the hole with thermal paste it should be in ? that may cause higher temperatures than expected

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9

Thx for all the help.

I ended up changing my nozzle and that fixed the issue almost completely.

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