Starting out in 3D printing? You’re bound to make a few errors — but that’s okay!
Here’s a guide to the most common beginner mistakes and how to avoid wasting time, filament, or money.
Learn from others so you don’t repeat the same mistakes. Let’s go 👇
❌ 1. Skipping Bed Leveling
🛠️ Problem: Uneven first layers, prints don’t stick, warping starts
✅ Fix: Always level the bed manually (or auto if available) before long prints
🧠 Trinity Tip: Use a paper sheet and feel light resistance between nozzle and bed
❌ 2. Not Cleaning the Print Bed
🛠️ Problem: Poor bed adhesion
✅ Fix: Use isopropyl alcohol (IPA) or mild soap water to clean glass or PEI beds
❌ 3. Printing Without Checking Supports
🛠️ Problem: Overhangs droop or collapse
✅ Fix: Always preview the sliced model and enable supports if angles > 45°
❌ 4. Wrong Filament Temperature
🛠️ Problem: Stringing, blobs, or under-extrusion
✅ Fix: Check the recommended temp on the filament box
🔧 Ex: PLA (190–210°C), PETG (220–250°C), ABS (230–250°C)
❌ 5. Starting with Complex Models
🛠️ Problem: Print fails due to unsupported parts or long duration
✅ Fix: Start with simple objects like calibration cubes, keychains, or phone stands
❌ 6. Too Much or Too Little Infill
🛠️ Problem: Weak structure or wasted filament
✅ Fix: Use 15–20% infill for regular items, 100% only if needed
❌ 7. Not Using a Cooling Fan
🛠️ Problem: Warping, sagging layers (especially on PLA)
✅ Fix: Ensure part cooling fan is ON for PLA and OFF for ABS during print
❌ 8. Forgetting to Slice Properly
🛠️ Problem: Printer doesn’t move properly
✅ Fix: Use slicing software like Cura or PrusaSlicer to convert STL to G-code
❌ 9. Loose Belts & Screws
🛠️ Problem: Layer shifts, inconsistent prints
✅ Fix: Periodically tighten belts and check motor screws
❌ 10. Ignoring Print Preview
🛠️ Problem: Misplaced supports or missing sections
✅ Fix: Always use layer-by-layer preview in slicer before printing
🧠 Bonus Tip: Keep a “Print Journal”
Track:
- Filament brand
- Print time
- Settings used
- Errors & outcomes
This helps improve results faster than trial and error alone.
🎯 Trinity Layers Pro Advice:
“Your first 10 prints may fail — and that’s okay. Learning 3D printing is about iteration, not perfection.”