Troubleshooting · 3D printing
First-layer problems in 3D printing
A print that fails at layer 200 usually failed at layer one and took six hours to admit it. The first layer is where adhesion, levelling, temperature and flow all show themselves, and learning to read it is the difference between a printer that works and a printer that is a lottery.
- Lines are separated and round, and you can see the bed between them — Nozzle too far from the bed. The extrusion is landing rather than being pressed down. Lower the Z offset in small increments — a tenth of a millimetre changes this visibly.
- The surface is rippled and translucent, and the nozzle drags — Nozzle too close. Material has nowhere to go and is being scraped. Raise the offset slightly; this also causes clogs if left.
- One corner is good and the opposite corner is not — The bed is not level, or is warped. Level at the corners the machine actually uses, and if the middle differs from the corners after levelling, that is warp rather than adjustment.
- It sticks, then lifts at the corners partway up — Warping, which is a cooling problem rather than an adhesion one. Reduce draughts, raise the bed temperature, and use a brim. Cold air across the printer is the commonest cause in a British garage.
- The bottom edge bulges outward — Elephant foot: the first layer is squashed and the weight above spreads it. Usually too close, too hot, or both. Most slicers have a compensation setting; fixing the cause is better than compensating for it.
- Nothing comes out for the first few lines — The nozzle was wiped clean at the start and the filament has retracted. A priming line or skirt solves it, and every sensible profile includes one.
Change one variable at a time and print a small test rather than a real object. The order that wastes least filament: clean the bed first, because grease from fingers defeats every other adjustment and costs nothing to rule out. Then level. Then Z offset. Then bed temperature. Then adhesion aids — brim, raft, glue stick. Only then start changing slicer flow or nozzle temperature.
Almost every beginner does this in reverse, starting with temperature because it is the easiest number to change, and ends up with a machine tuned around a dirty bed.
Questions this guide answers
Listed so you can tell at a glance whether this is the page you wanted. HobbyHQ keeps one guide per question family rather than a page per phrasing.
- why is my first layer not sticking
- 3d print not adhering to bed
- first layer too thin
- elephant foot 3d printing
- how do I level my print bed
- 3d printing adhesion problems
Part of 3D printing. Last reviewed 2026-08-15.