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 of grease or dust. Use a suitable build surface like a PEI sheet, glass with PVA glue stick, or blue painter’s tape. Set your bed temperature between 70°C and 80°C to help the first layer stick well. Also, print the first layer slower (around 20-30 mm/s) and slightly squish it onto the bed by lowering the nozzle closer than usual. Use a brim or raft in your slicer settings to increase bed adhesion. Avoid drafts and sudden temperature changes by enclosing your printer or printing in a warm room. Finally, check your cooling fan settings; reduce or turn off part cooling for the first few layers to maintain adhesion. Following these steps will significantly reduce warping and improve your PETG prints.