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 level and clean. Use a glass or PEI surface for better adhesion. Set the bed temperature between 70°C and 80°C to keep the first layers warm and reduce shrinkage. Apply a thin layer of adhesive like a glue stick, hairspray, or specialised printing adhesive to improve grip. Print the first layer slower and slightly lower than usual to help it stick firmly. Enclose the printer or print in a draft-free environment to maintain consistent temperature and avoid sudden cooling. Avoid using a cooling fan on the first few layers, then gradually increase fan speed. Finally, consider using a brim or raft in your slicer settings to increase the surface area of the first layer and anchor the print securely to the bed. Following these steps will greatly reduce the chance of warping with PETG.