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Troubleshooting

🛠️ Troubleshooting Guide

Common issues in FDM 3D printing and how to deal with them.
Applies to UltiMaker Cura and UltiMaker series printers.

⚡ Model Not Sticking to Build Plate

  • Check build plate alignment — all four pins must be seated properly.
  • Clean the plate — grease from fingers reduces adhesion; always wear gloves.
  • Leveling issue — re-level the plate if the first layer looks uneven.
  • Material mismatch — confirm the filament type matches the Cura profile.

📏 Holes Too Small / Pins Too Large

  • FDM printing tends to make holes undersized and pins oversized.
  • Solution: Add clearance (0.1–0.2 mm) when designing.
  • If already printed, carefully sand or file the part.

📉 Layer Shifts / Misaligned Print

  • Check that the build plate is firmly locked.
  • Inspect for loose belts or debris on the rails.
  • Make sure the printer is on a stable surface (no shaking or vibration).

🧵 Stringing or Oozing

  • Caused by filament leaking during travel moves.
  • Try lowering the printing temperature slightly.
  • Enable or increase retraction settings in Cura.

🔴 “Conflict” Error on Screen

  • Means the loaded filament or print core (AA/BB) does not match the Cura profile.
  • Check the printer screen for the correct combination.
  • If unsure, ask Yuwei before changing filament or nozzle.

⚙️ Print Head Rubber Damaged

  • The silicone shroud/wiper around the nozzle is broken or missing.
  • Do not print until replaced — report to Yuwei.

📊 Quick Reference Table

Problem Likely Cause Solution
Model not sticking Grease on plate, misalignment, wrong leveling 1.Set the build plate temperature to 75, and materials in right tempreture (PLA -> 215)
2. Or talk to Yuwei, she will use IPA to clean plate, and then re-level bed
Holes too small / pins too large Printing tolerance issue (FDM shrink/expansion) Add 0.1–0.2 mm clearance in design; sand if needed (please don't sand in the lab)
Layer shifts / misaligned print Loose plate, loose belts, vibration Lock build plate, check belts, ensure stable surface
Stringing / oozing Too high temperature, weak retraction Lower temp, enable/adjust retraction in Cura
“Conflict” error Wrong filament or nozzle/core mismatch Check machine screen; confirm material/core and change in your Cura
Print head rubber damaged Worn or broken silicone shroud Stop printing and report to Yuwei
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