Faolan
Thank you for your inquiry and verification.
I think I can answer your question. The main reason for this problem is the melting rate of the filament.
The reason why you need to increase the offset of Z offset. Because our filament has made some compatibility improvements for high-speed printers. In the same situation, our filament melting rate is higher than the standard filament. This also means that you need to reduce the flow rate in the slicing parameters. We recommend that the flow rate setting is 90%. Maybe you can try it.
In addition, your slicing settings.
We recommend that you control the temperature of the nozzle at 230C and the hot bed at 80C. The 65C for hot bed is not a good idea. PETG usually need 75C to get good adhesion to stick the bed.
What surprised me a little is that you set the temperature of the first layer higher than that of other layers.
But according to normal logic, the printing speed of the first layer is much lower than that of other layers, so you should lower the temperature of the first layer and increase the temperature of other layers.
Similarly, in the last layer, you should lower the temperature to prevent the filament from overheating and ruining the beautiful structure of the surface of your print.
For example, the first layer is 220C, and the other layers are 230C. This is our usual practice and conforms to normal printing rules.
Maybe you have found some interesting rules, you can also share and put forward different ideas.
