Symptoms
- Corners of the print curl upward off the bed
- Print detaches from the bed mid-job
- Warping is worse with larger, flatter prints
Likely causes
- CommonPoor first-layer adhesionAn uneven or dirty bed surface lets prints lift as they cool and shrink.
- CommonBed temperature too low for the filamentABS and similar filaments need a heated bed to prevent shrinkage-related lifting.
- PossibleDrafts or cool air hitting the printUneven cooling from fans or open windows causes uneven shrinkage.
- PossibleNozzle too far from the bed on the first layerA large gap leaves the first layer poorly bonded.
- Less commonNo brim or raft used on a warp-prone shapeLarge flat parts often need extra adhesion aids in the slicer.
What to do
- Clean the bed surface with isopropyl alcohol to remove oils and dust.
- Re-level the bed and check the first-layer nozzle gap is correct.
- Raise the bed temperature to the recommended range for your filament.
- Add a brim or raft in your slicer settings for large or warp-prone parts.
- Shield the printer from drafts with an enclosure or by closing nearby windows/doors.
- Slow the print speed slightly for the first few layers.
- Try a glue stick, painter's tape, or adhesion spray on the bed if warping continues.
Tools and parts
- Isopropyl alcohol
- Glue stick or painter's tape
When to call a pro
If warping persists after adjusting adhesion, temperature, and drafts, a technician can check if the heated bed itself is heating unevenly.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.