wobble in walls and sinking top surface

Not sure that is going on here, I've reduced print speed and re tensioned the belts of my vcore3 and this is the best I can get it, it's also meant to be 20mm diameter
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11 Replies
optimistic-gold
optimistic-gold17mo ago
print the same model but without infill and with only one wall , see if it's the same
sherbs
sherbs16mo ago
What type of plastic is that? Could just be normal shrinkage - especially if it's wet
fair-rose
fair-rose16mo ago
Hey sorry for the late responses, the filament is Formfutra tough pla. And the this "shrinkage" only happens on circular parts, any straight/flat surfaces are perfect. i use the same filament on my personal printer, flashforge dreamer nx. i have not had this happen before.
sherbs
sherbs16mo ago
May be that you just need more cooling? I've seen this effect with other plastics when printing test cylinders without enough cooling.
fair-rose
fair-rose16mo ago
Just ran some cylinders that are slightly larger and they have printed fine, I think with it being a 500 it may not like to print parts that are so small
fair-rose
fair-rose16mo ago
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sherbs
sherbs16mo ago
Larger might mean layers taking longer to complete, this having a bit more time to cool before next layer gets laid down 500 should print small parts just fine
like-gold
like-gold16mo ago
The shrinking does not refer to the size of the Printhardware. It is refered towards your Extrusion multiplier, your correct rotation distance and also correct print temperature aswell the cooling factor. besides that there is no hardware limitation for size of printed model. edit: a sign of shrink or extend can be a too tight or to loose belt too.
like-gold
like-gold16mo ago
so if u are able to validate your rotation distance with a scale then do it by checking it for 100mm in distance and than calculate it. after that start to a extruder calibration and then https://ellis3dp.com/Print-Tuning-Guide/
Ellis’ Print Tuning Guide
Welcome!
Ellis’ Print Tuning Guide
like-gold
like-gold16mo ago
wobble in walls does not necessary has to be a belt or xy problem it also can be a extruder bearing / gear problem. u can check that part too with the volumetric flow and see if the extruded line in the air has a even size. if not u found a point to double check.
fair-rose
fair-rose16mo ago
Apologies for the lack of replies, just found the issue. The part cooling fan had seized. Sorry for dismissing it being a cooling issue so soon. Tbh, given it's done nearly 2000 hours worth of prints since March 2022 I'm not surprised something had died on it. Cheers for all your help.
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