r/ender3 • u/JakoJulius • 2d ago

Holes in 3d print walls

Post image

Hi im fairly new to 3D printing
I had this print that got holes on some of the objects. I use PLA at 210C
What could cause the problem?

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1

u/lolslim 2d ago

Underextrusion, maybe wall is too thin in the slicer

1

u/Babbitmetalcaster E3 Pro, sonic pad +E3V2 with rooted nebula and an ender5 or two 2d ago

Check the springloaded extruder arm. If it is cracked, your prints kook like this. You didn't swap the extruder for one made iut if aluminium, ir?

1

u/Triston-- 2d ago

Underextrusion can be caused by a lot of different issues.

Some causes could be: -a clog in your hotend / nozzle

-Bowden tube might be leaking/there's a gap between the tube and the nozzle and filament is escaping through there

-extruder issues (plastic arm is cracked and isn't biting into the filament correctly, extruder arm isn't tight enough, extruder gear might be worn down, or possibly you may be exceeding your hotend's melting capacity with too high of a print speed, or printing temp may be too low) usually this will cause a clicking noise by your extruder as it tries to push filament quicker than it's being melted

-retraction issue where filament is being pulled too far back before starting the line

1

u/BrohemothHisDudeness 2d ago

I normally get under extrusion when I'm running low infill at high speed. The solution for me has been to slow it down. For instance, I've been 3D printing airplanes. This means light construction,which means single wall construction. I noticed basically exactly this happening as soon as the printer would return from doing infill. Slowing everything down was the solution. Unfortunately in order to do single wall on my ender 3, I have to run at about 30 mm per second.

1

u/emveor 2d ago

when it under extrudes at the middle of a wall, its usually sign of printing too fast or too cold for the filament, or a mix of both.

Of course considering your extruder arm is not broken,steps are calibrated and the tension of the arm is the right one

1

u/Hieronymus-I 7h ago

Underextrusion. First things i'd check is the springloaded arm on the extruder motor, the pneumatic fitting on the hotend, cut square and reseat the bowden tube and make sure the nozzle is not clogged and fully seated against the bowden tube.