Since about 2 weeks I observe a great difference in print quality on both my sv08 printers. Despite using new petg filament from my trusted supplier the print contains large amount of blobs, zits and stringing. Also after the partcooling is enabled the top of almost every layer is rough I tried cl…

And guess what, the other printer had the exact same issue. [IMG_20241025_090228] After putting the idler gear shaft back in it’s place and securing it with a glued on disc of plastic the print was perfect again [IMG-20241025-WA0005]

What fan speed are you using? Some PETG can only be printed with a max fan speed of 20-40%, and with a temp at 260-270

I did also try to lower the fan speed because of the lower environment temperature, but I haven’t tried larger prints with that.

You can also use your oven at low temperature (60°C max)

All the filament i tested today was previously dried in a food dryer and stored in vacuüm bags. I think i found the issue on one of them in the extruder idler gear axle which had came out of the handle at one end. I guess the jerks on the extruder make it work it’s way out through vibrations, causi…

I wasn’t sure exactly what you were talking about the first time without a pic. Now seeing the issue, I have to say…I’ve never seen this one before. :upside_down_face:

On my side i did not had this trouble (yet ?). Maybe it’s better to print it… just in case :stuck_out_tongue: I found that few time ago but i did not understood well… now it’s more clear : SV08 Extruder fix by Valerie Moore | Download free STL model | Printables.com

I had exactly the same, and I remembered this fix from my sv08 search on printables and thingiverse. It took me some time to realize this was my issue though, because I would have never suspected this to be the cause of the artifacts I was getting.

For comparison : right with the idler gear shaft out of place, left with the gear secured again. Exact same filament and slicer settings. [under extrusion]

I printed it… and i did not see the same difference (that is very extreme xD) but BTW… that printing like a charm. Maybe as another said in comment (on printables or thingiverse) : i did know that i have this trouble before to fix it. That is probably my best upgrade of my SV08 (ratio cost/efficacit…

There’s an “extruder gear fix” that was designed by a woman on a Facebook group for this exact problem. I printed the most current version she posted on 11/11/24 and it worked great. I’m posting the link below for anyone who needs it. Works great! Extruder Gear fix

Suddenly poor print quality on two SV08's - solved with extruder idler gear

Sovol SV08

rdarder July 2, 2026, 10:25pm 31

Thank you! I was going nuts not finding the root cause for this issue.

Filament extrusion problem on Sovol SV08

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Suddenly poor print quality on two SV08's - solved with extruder idler gear

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