I have similar problems on my UM2+connect. The weird thing is that it's depended on the layer height settings chosen in Cura.
With 0.1mm it prints okay. At 0.15mm and 0.2mm layer height it is so bad it basically becomes see through.
Tried resetting the printer, updating firmware, resetting profiles in Cura, slicing on different cleans installs of Cura. Nothing seems to help. Any ideas on what to try next or what could cause this?
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gr5 2,224
That's severe underextrusion. Which is rare on the S5. Did you mess with speed or temperature?
The most common issue is probably the front fan. Check that the front fan (not the side fans) is spinning WHEN IT IS UNDEREXTRUDING.
This printer looks old so that's my guess.
Then I'd try a new print core.
And finally I'd test the feeder - get the filament only partially in the bowden - say half way - but definitely not in the print head. Then use the MOVE command (middle menu on left then top left button, then ... button) and fight the feeder by using your other hand to pull down on the filament and fight it until it slips. Then lift a weight and estimate how much force is needed or grip a weight to the filament.
5 pounds is borderline failing
10 pounds is a pass
15 pounds is typical
And did you mess with the profile? Especially line width, print speed, layer height, flow, temperature. Actually messing with 30 different parameters can each cause underextrusion.
Report back on these 4 issues/tests.
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