How to Prevent PETG Warping from the Print Bed

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

Answer: To prevent PETG warping, start by ensuring your print bed is perfectly level and clean—use isopropyl alcohol to remove oils and dust. Set the bed temperature between 70–80°C for good adhesion. Applying a thin, even layer of a suitable adhesive like a glue stick or specialised printing tape can help. Use a brim or raft in your slicing software to increase the surface area touching the bed. Lower the first layer print speed to around 20–30 mm/s and increase the first layer height slightly for better bed grip. Avoid drafts and sudden temperature changes around your printer by enclosing it if possible. Finally, keep the nozzle temperature within PETG’s recommended range (230–250°C) to ensure proper extrusion and adhesion. Following these steps will greatly reduce warping and improve print success with PETG.