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 free from grease or dust. Use a suitable build surface like a PEI sheet or glass with a light layer of glue stick or hairspray to improve adhesion. Set your bed temperature between 70°C and 80°C and the nozzle temperature around 230°C to 250°C, adjusting based on your filament brand. Enable a brim or raft in your slicer to increase the surface area of the first layer. Print the first layer slower and slightly thicker (around 0.2 mm) to help it stick better. Avoid drafts and sudden temperature changes by printing in an enclosure or a draft-free space. Lastly, calibrate your bed level carefully to ensure the nozzle is at the correct height; too far or too close can cause poor adhesion and warping. Following these steps will greatly reduce warping and improve your PETG prints.