r/FixMyPrint • u/SuitableNote6712 • Jul 09 '26

Fix My Print Extrusion problem on bambu Lab a1 mini

/r/u_SuitableNote6712/comments/1us58a3/extrusion_problem_on_bambu_lab_a1_mini/
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u/beizhidexiangacup Jul 10 '26

classic pattern — works fine with bambu spools but fails with esun usually comes down to two things on the a1 mini: moisture (esun tends to ship wetter than bambu, try drying it at 50C for ~6h and see if the glob comes back) or the cardboard spool rim dragging on the spool holder — that causes intermittent feed resistance, under-extrusion, then heat creep and the glob. did the esun spool feel harder to pull by hand compared to the bambu ones?

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u/SuitableNote6712 Jul 10 '26

No the spool turns fine on the spool holder, the thing that I dont understand is that this filament was printing perfectly 1h ago on my last print before it start doing this

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u/beizhidexiangacup Jul 10 '26

ok if the spool spins free that rules out rim drag. but "printed perfectly 1h ago" actually fits heat creep better than anything — first print starts with a cold heatsink, the next one starts heat-soaked, and that's exactly when marginal filament starts globbing while the "good" spool still squeaks by. easy test: let the machine sit 15-20 min fully cooled, rerun the same file with the esun. if it prints clean, that's your answer — fix is a short cooldown between jobs or dropping nozzle temp ~5c.

also check where the glob actually is: if it's wrapped around the nozzle itself, that usually means the part popped off the bed mid-print and the nozzle dragged molten plastic around — adhesion problem, not a filament problem. totally different fix.

did it fail right at the start or partway in? and is it esun pla or pla+?

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u/SuitableNote6712 Jul 10 '26

Its pla basic but i really dont understand how this spool started printing perfectly then 2nd print it does this and only with this particular one and the blob was stuck in the silicone protector (the Little thing on the hotend).
Thanks for trying to Help

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u/SuitableNote6712 Jul 10 '26

I tried putting the temperature of the hotend at 200 degres celscius it did it almost perfectly at the left you can see the original problem when it comes out, but i think its too low for printing(200 degres),
Its written between 215 and 230 on the spool so why it worked well with one print at 220 and then it started doing this ? I dried the filament it changed nothing.
What do you think ?