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Difficulty: MediumPrinter Technologies and Consumables Maintenance

An IT support technician is setting up a new fused deposition modeling (FDM) 3D printer. During the initial test print, the extruded filament fails to adhere to the heated build bed and gathers into a tangled mass of plastic around the print head nozzle. Which of the following maintenance or calibration procedures should the technician perform first to resolve this issue?

  1. Calibrate the bed leveling and adjust the nozzle Z-offset.Answer
  2. B
    Clean the primary charge roller with high-percentage isopropyl alcohol.
  3. C
    Increase the fuser assembly temperature setting in the print queue properties.
  4. D
    Replace the optical transfer roller and reset the maintenance counter.

Answer

Calibrate the bed leveling and adjust the nozzle Z-offset.
In FDM (Fused Deposition Modeling) 3D printing, first-layer adhesion depends on having a level build plate and a correctly calibrated Z-offset. If the nozzle is too far from the bed, the melted filament will not adhere to the surface and will warp or drag, creating a tangled mass of plastic.

Step-by-Step Solution

1
Identify the symptom
Extruded thermoplastic filament is not sticking to the build platform, causing print failure and filament bunching around the nozzle.
In FDM 3D printing, poor first-layer adhesion is almost always caused by an incorrect distance between the nozzle tip and the print bed.
2
Determine the appropriate hardware maintenance/calibration action
Level the build plate and adjust the Z-offset distance.
Setting the proper initial Z-offset ensures the filament is squished slightly onto the build plate for proper adhesion.

Key Concept

FDM 3D Printer Bed Leveling and First-Layer Adhesion Maintenance
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Topics

Printer Technologies and Consumables Maintenance

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