Ender 3 V2 Z-axis base value changes for each print I'm new to 3D printing, I just bought an Ender 3 V2 and I am having a lot of trouble with bed adhesion. After a lot of playing around it seems that the base value for Z is changing for every print. I have been using this Z-offset test model, dialing in my Z-offset during the print until I hit an acceptable value (eg. -0.15) If I then print the same model again, using the value I found above, it is way off again, and I have to dial it further down to maybe -0.40 and, if I repeat again, to 80. I have, of course, tried leveling my bed multiple times I've just been scribbling down numbers and seeing them fail for two days now, so any help is much appreciated.

After tightening the screws on the X-axis gantry and doing the bed leveling and test prints again it seems to have gotten better.

Also, while I was under the impression that the V2's heated glass bed _should_ work well without adhesive, I applied a bit of glue stick and now my first print seems to have a perfect first layer.

I may just have been confused because I needed to turn the Z-offset way down to get it to stick in the first place, and then tweaked it upwards to get nice lines, meaning I would have to dial it back down on next test print and so forth.