PETG for Enclosures: Warping + Stringing Fixes
PETG is tough and clear, but it loves to string and can warp on big panels. Use these tweaks for clean enclosure parts.
Basics
Dry PETG (60–65°C, 6–8 hours). Use a clean PEI or textured plate. Avoid aggressive squish; PETG can fuse to PEI—use a glue-stick barrier if needed. Keep part cooling moderate (20–40%).
Warping Control
Use an enclosure to stabilize temps. Bed at 75–85°C, nozzle 235–250°C. Add a 6–10 mm brim and chamfer sharp corners in the model. If the first layer lifts, reduce fan for the first 5–10 layers and ensure the plate is fully clean.
Stringing Control
Reduce retraction distance vs. PLA, increase travel speed (180–220 mm/s if your printer supports it), and dry the filament thoroughly. A slightly higher temp improves clarity but can increase stringing—balance with travel and coasting.
Clarity Tips
For clear walls, use fewer perimeters (2–3), larger layer heights (0.28–0.32 mm), slower outer walls, and keep flow tightly calibrated. Avoid too much cooling—hazy flow lines are often over-cooling.
Troubleshooting
Blobs on seams? Reduce outer wall speed or enable “wipe on retract.” Corners lifting? Add mouse ears and a hotter first layer. Nozzle ambering? Lower temps slightly and keep PETG residue off with periodic cold pulls.