Extrusion / z banding on A1 mini

Ive had an inconsistent issue plaguing me for weeks. Despite the printer working perfectly for months

I have cleaned and lubed all rails and the lead screw. I have tightened all bolts and belts i could easily access. I have tried multiple filaments, dried them and tried again.

I have dialled in the calibration of the filaments, adjusted the Z hop and speed settings to no avail.

Cleaning and lubing fixed most of the issues, but not the inconsistent z-ribbing. In the pictures i have included the two test towers were printed one after the other. The ribbing/banding is in different places.

Any ideas?




Someone else just had a similar issue.

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I think their issue is because the temp is too low. PLA+ should be at least 210, i run mine at 215.

The images do look similar though, thanks.

I updated my slicer, and managed to get 95% of a good print. It did some banding right at the end. Then the next two prints failed.

Was worth a try. Thanks