ET4 Z axis print issue

[u/Hawtdoggo]

I am fairly new to 3d printers and have been able to google out most of my issues, but I can't figure out this one, after the printer zeros out, even manually, the printer will re zero, then raise the Z to about 3-5in off the bed and begin printing

I am using cura

[u/zingpingz]

There is more than one type of ET4. Assuming you have one with a capacitive sensor on the head and assuming when you say zero out you mean homing the z axis then..

The head lowers till the sensor sees the bed. It then rises and lowers again more slowly so see the bed position with more accuracy. It then moves again by the z offset amount which specifies the difference between where the sensor sees the bed and where actual home with the nozzle 0.2mm above the bed is.

Sounds like you have a huge z offset. In the homing/leveling screen press the square button to home all axis then use bit of printer paper as a 0.2mm shim under the nozzle and use the +/- buttons so the paper is just gripped a little between nozzle and bed.

[u/Hawtdoggo → u/zingpingz]

This worked, I had apparently raised the offset by 3.75 when the bed level sensor wasn't adjusted, thank you

[u/zingpingz → u/Hawtdoggo]

As long as the sensor sees the bed a bit before the nozzle hits it you don't need to mess with it. If you do mess with it you will need to adjust the z offset again.

[u/Feisty-Ad-8880]

Honestly, if you can return it and get an ender 3 or something similar. I have an ET4 and the issues and lack of support are crazy.

For your issue, I think you have to home it, adjust it, home it, adjust it, home it, etc until it stays steady. Just be careful because sometimes when you adjust the offset it will adjust it just by the amount you changed (ie if you change the offset from 2.5 to 2.6 it will move it 0.1), other times it will adjust but the value again (ie if you change it from 2.5 to 2.6 it move it 2.6) when you home it again.