My 3D print is covered with thin threads

My 3D print is covered with thin threads

How do I prevent stringing and oozing?

When threads have formed between the different parts of the 3D print, you can solve this by adjusting the retraction settings. This pulls the filament back into the print head to prevent leakage. When the printer starts working on a new part, the filament will be pressed out of the print head again, so that no wires are created in the meantime. Adjusting, among other things, the retraction settings per extruder can help to prevent stringing and oozing. 

Use the tips below to prevent wires from leaking from the printhead:

• Retraction Distance

  This distance determines how far the filament is retracted into the printhead. The more the filament is pulled in, the less chance of oozing. When the 3D printer suffers from oozing, you can increase the retraction distance by 1mm at a time. This determines the correct retraction distance to prevent oozing and stringing.

• Retraction Speed

  The retraction speed is the speed at which the filament is retracted into the printhead. When the filament is drawn in too slowly, the chance of oozing during displacement is very high. Also, a too fast withdrawal has consequences for the 3D print. If the filament retracts too quickly, it cannot be pressed out in the next printing movement. The filament can come loose from the hot plastic in the print head or the drive gear can grind away parts of the filament. The ideal retraction speed may differ depending on the material you are using.

• Temperature too high

  Another common reason for stringing is too high a temperature. Instead of viscous, the filament becomes much too liquidised, causing the plastic to leak out of the print head. In contrast to too high a temperature, too low a temperature causes the filament to have a too solid shape. This prevents it from being squeezed smoothly out of the print head. Try lowering the temperature about 5-10 degrees at a time to see if this solves the problem with the wires.

• Long moves in open plains

  Stringing occurs because filament leaks during the movement. The duration of the movement between one surface and the other also influences this. The longer it takes the extruder to move, the more likely it is to leak. When a short distance has to be covered, the movement can be completed quickly enough to give no chance for leaks. If your 3D printer software has the ability to determine the path, you can see if you can shorten the path the extruder has to travel. Sometimes it is even possible to completely cross the path over the plastic, which means that open spaces can be completely avoided.

• Extruder Movement Speed

  Another possible solution is to adjust the speed of movement of the extruder. By accelerating the movement between parts, the extruder spends less time in open areas. This reduces the chance of leaks. 

If you can't figure it out with the settings, you can always remove the wires that have arisen on the 3D print using a heat gun. When set to 200 degrees, you can melt unwanted wires by directing the heat on the wires for 1 to 2 seconds. The printed object should not be damaged by this.
 

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