PRINT SETTINGS:
- Do your e-steps, temp-, flow- and retraction towers. Starting with a good dialed-in printer really makes a difference. A decent PLA dialed-in printer is not neccessarily a good setup for PETG, but it`s a good start.
- Make sure your filament has no moisture in it.
- Check your filament brand for temperatures. Most filaments print with 240c nozzle and 75c bedtemp.
- Set your Z-offset a little higher. PETG doesn`t like to get squished like PLA does.
- Print the first layer a little thicker. (eg. 0.28mm if you print with a 0.20mm layerheight).
- Reduce fan speed. No fan for first 10 layers, then go for maximum 30-50% fanspeed.
- Use an adhesive (like Magigoo Glue) as a release agent. PETG can really bond to glass. Use PEI sheet for best results, also with an adhesive.
- Print your first layers slowly, like 20mm/s, with rest on 40mm/s. Then try to speedup and up your nozzle temp, flowrate and fanspeed a bit.
- Standard is 4 walls, for stronger prints you can go to 6 or 8 walls.
- Let the bed cool to room temperature after finishing helps tremendously with print removal. Most of the time it will popoff before it reaches room temperature.
Some common issues
Some issues that you can run into are:
There are possibly more things to look at, but with this you should get started.