Layer shifting

[eddyuk]

Hi,
After printer worked for a while, I noticed that prints started to get inconsistent surface. I printed the example dog that was on SD card again, and it surface was kind of wavy - not as the one I printed initially (https://photos.app.goo.gl/QVKP2me6fvSAZDrc6).

I suspected the Y axis at first since one print had a 1mm layer shift on it, but then I saw that Z rod is very loose, also the nut. I made a short video since I don't know, maybe it is normal and should be like that: https://photos.app.goo.gl/tP65rey3K3Vjxhw26

Thanks

[William]

Hi,you can try to tighten it and replace it if there is a problem with the z-axis threaded rod.