How to Prevent PETG Warping During 3D Printing

Question: How do I stop PETG from warping off the bed?

Answer: To prevent PETG from warping, start by ensuring your print bed is clean and level. Use a glass or PEI bed surface for better adhesion. Set your bed temperature between 70-80°C and the nozzle temperature around 230-250°C, depending on your filament brand. Apply a thin layer of glue stick or use specialised adhesion sheets like BuildTak for extra grip. Enable a brim or raft in your slicer settings to increase the surface area touching the bed. Avoid cooling fans during the first few layers or keep them at a low speed to reduce rapid cooling, which causes warping. Print in a draft-free environment or use an enclosure to maintain stable ambient temperature. Finally, slow down your first layer speed to about 20-30 mm/s to help the filament stick better. Following these steps will significantly reduce warping and improve print quality with PETG.