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I have an Ender 3 V2 which is around 6 months old. Recently, extruding slowed to an almost complete halt seconds into a print for no apparent reason. The extruder works perfectly when extruding manually (using the extrude setting) and I see no reason for it to not extrude properly. I am using Ultimaker Cura and a new filament (my old one has the same issue). The print speed is 10mm/s and the temperature is correct for the filament which is PLA+.

After some testing it seems random when it stops extruding but it always happens within the first 10 seconds of the print starting.

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    $\begingroup$ Since you're not printing fast or anything, I think the most likely explanation is a loose or broken tension arm on the extruder. Check that it's gripping the filament and watch what happens when it stops working. $\endgroup$
    – R.. GitHub STOP HELPING ICE
    Commented Aug 13, 2022 at 20:48
  • $\begingroup$ @R..GitHubSTOPHELPINGICE It can extrude manually when I turn the extrusion wheel by hand or when I use the extrude function under "move". It only stops whilst it is printing a model so I don't think it is the tension arm but I'll have a look and get back to you in a bit. $\endgroup$
    – Jacob Boughton
    Commented Aug 13, 2022 at 20:54
  • $\begingroup$ @R..GitHubSTOPHELPINGICE After having a look it seems that the extruder just starts turning incredibly slowly just after starting the print (never during the line that it does at the beginning of every print). $\endgroup$
    – Jacob Boughton
    Commented Aug 13, 2022 at 21:13
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    $\begingroup$ Wait, so it only extrudes the priming line, then nothing comes out for the model? Sounds like you have your slicer configured for extremely low or no flow, or wrong filament diameter. $\endgroup$
    – R.. GitHub STOP HELPING ICE
    Commented Aug 13, 2022 at 22:15
  • $\begingroup$ @R..GitHubSTOPHELPINGICE It works for the 3 seconds (ish) on the actual print and then stops working. I will have a fiddle with the Slicer settings. $\endgroup$
    – Jacob Boughton
    Commented Aug 14, 2022 at 6:35

1 Answer 1

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If it only extrudes the priming line, then nothing comes out for the model, this sounds like you have your slicer configured for extremely low or no flow, or wrong filament diameter. Check that any flow settings are at or near 100% and that the filament diameter in the machine, extruder, and material settings is correct (1.75 mm for most printers).

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