What might cause these effects?

Snapmaker Original
21

How do you chose retraction speed? 50 mm/s seems pretty fast, is it safe for the extruder?

I quit printing PET-G for now since whatever I did the corners of the printed thing lifted from the bed very often. Making the straight things curved or even banana-shaped. I tried different extrusion and bed temperatures, different calibration, blue tape, new sticker, extra fans etc. with now success. PLA seems more predictable. I like PET-G and going to return to it some day but not now. I need to learn more.

22

I’ve tried a few settings for the retraction and with 50 mm/s there are nearly to no strings because the molten material is sucked in faster.
Calibration musn’t be too close.
Warping with the snapmaker sticker is caused by by bad layer adhesion of the first layer.
Higher temperatures (up to 240-245°C depending on the material/colour) and very slow speed will help.

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