Z wobble test

thingiverse

Z-axis is clogged, teeth broken. Relevel bed to get print head working properly. Check for worn-out rods on the z axis as well, may need replacement or re-welding if broken. Inspect teeth for damage or misaligned teeth which could also cause alignment issues and disrupt Z axis functionality altogether. If these parts fail then there is no way to repair this printer - its doomed for the dustbin of history right from day one