PETG
PETG is a go-to for functional parts that need impact resistance and mild heat tolerance. It can string and blob if not dried and tuned.
Typical print: Nozzle 235–250 °C, Bed 70–85 °C, 35–55 mm/s
Drying: 60–65 °C for 6–8h. Drying cuts stringing and improves clarity.
Adhesion: PEI works well; apply glue-stick as release layer to avoid bonding too strongly.
Notes: Mild fumes; ventilate. Avoid overheating which causes ambering on nozzle.
Pros
- Great layer bonding
- Toughness
- Better heat resistance than PLA
Cons
- Stringing if wet
- Blobs/zits on seam
- Can stick too hard to PEI
Stringing Control
Reduce retraction vs PLA (0.6–1.2 mm direct drive), increase travel (180–220 mm/s if supported), dry thoroughly.
Clarity for Panels
Use fewer perimeters, larger layer heights (0.28–0.32 mm), slower outer walls, and moderate cooling.