Getting Started with 3D Printing
Article author:
Eolas PrintsArticle published at:
June 17, 2026
If your print won't stick to the bed, lifts at the corners, or the first layer comes out as a tangle of loose lines, you're dealing with the most common 3D printing failure of all — and the good news is the first layer is also the easiest thing to get consistently right once you understand it. The first layer is the foundation: get it perfect and most prints succeed. Here's how to diagnose and fix bed-adhesion problems for good.
The Golden Rule: It's Almost Always the Z-Offset
Before anything else: the distance between nozzle and bed (the Z-offset, or 'first layer height') is the single biggest factor. Too high and the filament is laid down as round, loose strands that don't bond to the bed or each other. Too low and the nozzle scrapes, starves the flow, or refuses to extrude. A perfect first layer is slightly squished — the lines should be flat-topped and fused side to side, like neat ribbon, not round spaghetti. Most adhesion problems disappear the moment the Z-offset is right.
Diagnose by Symptom
| What you see | Most likely cause | Fix |
|---|---|---|
| Lines round and not touching; print pops off | Nozzle too high | Lower Z-offset |
| Nozzle scrapes, gaps, no extrusion | Nozzle too low | Raise Z-offset |
| Corners curl up mid-print | Warping (cooling/temperature) | Enclosure, brim, no draughts |
| One area sticks, another doesn't | Bed not level / not trammed | Re-level / auto bed level |
| Nothing sticks anywhere | Dirty bed or wrong temp | Clean bed, raise bed temp |
| Sticks too well, tears the sheet | Over-adhesion (often PETG) | Release agent, raise nozzle slightly |
The Fixes, in Order
1. Clean the Bed
Fingerprints leave grease, and grease kills adhesion. Wash a PEI or glass bed with warm water and dish soap, or wipe with isopropyl alcohol (IPA). Do this regularly — it's the cheapest, most effective fix, and handling the plate barehanded between prints is the most common reason adhesion suddenly fails.
2. Level the Bed / Set Z-Offset
Run your printer's bed-levelling routine (manual tramming or automatic mesh levelling). Then fine-tune the Z-offset on a first-layer test print or a 'first layer patch', adjusting live until the lines look flat and fused. This is the step that fixes most problems.
3. Get the Bed Temperature Right
Each material needs a minimum bed temperature to bond: PLA around 60 °C, PETG 70–90 °C, ASA/ABS 90–110 °C. Too cool and even a clean, level bed won't hold. See our material settings guide for the full ranges.
4. Use an Adhesion Aid
A purpose-made adhesive removes adhesion as a variable entirely. Magigoo Original bonds when hot and releases when cool — strong hold during printing, easy removal after, and it doubles as a release barrier that stops sticky PETG from tearing the sheet. For flexible filaments, Magigoo Pro Flex is formulated for TPU and similar materials.
5. Add a Brim or Raft in the Slicer
A brim (a flat skirt attached to the model's edge) adds surface area and fights corner-lifting — ideal for tall or small-footprint parts. A raft (a full base layer under the model) helps on stubborn warpers or uneven beds, at the cost of some filament and a rougher underside.
6. Stop Warping at the Source
For ABS and ASA, corner-lifting is really a cooling problem: the plastic shrinks as it cools unevenly. The fix is environmental — an enclosure to hold chamber heat, no draughts from open windows or AC, and minimal part cooling. This is exactly why enclosed printers like the Flashforge Adventurer 5M Pro handle these materials so much more reliably.
Surface Matters Too
Different build surfaces suit different materials: textured PEI is forgiving and grippy for PLA/PETG; smooth PEI gives glassy bottoms but can over-grip PETG; glass with adhesive is great for ABS/ASA. If you're constantly fighting one material on one surface, switching surfaces (or adding a release agent) is often the real fix.
Consistent Filament, Consistent First Layers
Inconsistent filament diameter shows up first in the first layer. Our filament is made in Spain to tight ISO/REACH diameter tolerances, so once your Z-offset and bed temp are dialled in, your first layers stay reliable spool after spool. Still can't get that first layer down? Tell us your printer, surface, and material and we'll help.