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 — Yuwei will help with re-levelling.
Material mismatch — confirm the filament type matches the Cura profile, and set to the right temperature.
- Build plate temperature: 75
- PLA temperature: 215, printing speed 80 - 120
- TPU temperature: 225, printing speed 40~80
- PVA temperature: 225 , printing speed 30~60
- PETG temperature： 245, printing speed 80 - 120
đź“Ź 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.
đź“Š 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 |