3d prints using ultimaker cura make a tangled mess

[Oq_55 0]

any 3d print i make using ultimaker cura just prints a line and a tangled mess. but for some reason creality slicer prints fine. ive already done the bed levelling process and i use ender 3. do i need to use a different website to download models? because as of now i use thingiverse (im pretty new to 3d printing btw).

Edited April 20 by Oq_55

[GregValiant 697]

Thingiverse is fine.  Some of the model STL files can have errors but they can usually be repaired using Fusion 360's NetFab or MS 3D Builder, or Cura's own Mesh Tools.

If the plastic was sticking to the bed properly then you wouldn't be here.  Here are some questions to ask yourself.

 

 

Are you using a BLT or some other Auto-Leveling system on your printer?  Maybe the Z offset needs to be tweaked.

Are you using any adhesion promoter like a glue stick or hairspray?

Have you calibrated your E-Steps?  That should really be #1.

What are your normal "Flow" settings in the Material settings in Cura?  (There are 9 flow settings).

Your clean your build plate with dish soap and then wipe it down with Isopropyl Alcohol prior to printing and applying the adhesion promoter?

The trolley wheels on the X and Y are all adjusted nicely so you can just turn them with your fingers?

There is no binding in the Z and the Z motor always Auto-homes to exactly the same place?  (inconsistency there can be a big cause of bed failure prints).

When the first layer goes down all the extrusions should be flat an welded together side-by-side with no gaps.  If instead they look like a bunch of little sausages then your leveling is off (no squish).

Moderator @gr5 made up THIS VIDEO about bed adhesion and warping.  It covers a lot of material and you might want to make some popcorn, but it's pretty much all in there.

 

Or you can just jack up your Initial Layer Flow to 120% and cross your fingers.