Best PETG Print Settings
A practical PETG settings guide: temperatures, speed, cooling, and bed adhesion — for clean, strong prints without stringing or first-layer problems.
PETG is strong and practical, but more sensitive than PLA — especially to speed and cooling. The right settings are the difference between a clean, durable print and a stringy, cracking mess. Here's a reliable starting point we've tested on dozens of spools.
Temperatures
Nozzle temperature for PETG sits between 230 and 250°C, and the bed between 70 and 85°C. Start in the middle of each range, then tune up or down based on the layer quality you see on the part, since every spool and printer differs slightly in what they prefer.
Speed and flow
PETG likes moderate speeds. Too fast weakens layer adhesion and worsens stringing; too slow causes blobs and local burning. Set print speed between 40 and 60 mm/s, and reduce flow slightly to around 95% to cut bumps and strings. Retraction needs careful tuning — too much causes clogs, too little leaves visible strings between parts.
Cooling
Unlike PLA, PETG dislikes heavy cooling — it weakens layer bonding and warps parts. Run the part fan at only 30–50%, and turn it off completely for the first 2–3 layers.
Bed adhesion
PETG sticks hard — sometimes hard enough to chip a glass bed. Use a release layer (PVA glue stick or painter's tape) to protect the surface, and raise your Z-offset slightly compared to PLA settings.
Final tip
Print a temperature tower for every new spool to find its ideal temp — color and brand both shift behavior a little. All PETG at Thlath Abaad is 1.75mm and reliably consistent, working with most home and prosumer printers.