BEST PETG PRINT SETTINGS FOR ANY 3D PRINTER

PETG (Polyethylene Terephthalate Glycol) combines the ease of PLA with the strength and flexibility of ABS. It's resistant to moisture, chemicals, and UV light. It doesn't warp like ABS and doesn't need an enclosure. The trade-off: it's prone to stringing and can be finicky with bed adhesion (it sticks TOO well to some surfaces).

Nozzle temperature: 230–245°C — PETG needs significantly higher temps than PLA. Start at 235°C. If layers don't bond well, go higher. If stringing is bad, go lower. Bed temperature: 75–85°C — PETG needs a warm bed. 80°C is the sweet spot for most setups. Important: PETG bonds aggressively to bare PEI and glass. Use a thin layer of glue stick as a release agent on PEI sheets. This sounds counterintuitive but prevents the PETG from ripping chunks out of your PEI surface.

Print speed: 40–55 mm/s — PETG prefers slightly slower speeds than PLA. Faster speeds increase stringing and reduce layer adhesion. Retraction: 4–6 mm (Bowden) / 1–3 mm (Direct Drive) at 25–40 mm/s. PETG is more viscous than PLA so retraction speed should be lower to avoid grinding. Travel speed: 150 mm/s — Fast travel helps reduce stringing. First layer speed: 20 mm/s — PETG is unforgiving on the first layer. Go slow.

Fan speed: 30–50% — This is where PETG differs most from PLA. Too much cooling causes poor layer adhesion and can make PETG brittle. Too little causes stringing and blobbing. Start at 40% fan and adjust. For bridges and overhangs, your slicer can temporarily increase the fan. Fan off for the first 3 layers — This is critical for bed adhesion with PETG.

Layer height: 0.2–0.24 mm — PETG flows well at slightly thicker layers. Infill: 20–30% for general use. PETG's natural flexibility makes it strong even at lower infill percentages. Flow rate: 95–100% — Some printers over-extrude PETG slightly. If you see blobbing, reduce flow to 95%. Z-offset: Set the first layer slightly higher than PLA. PETG doesn't like being squished as aggressively — it creates a rough texture if too close.