Z Banding/wobble problems

Since some time I have Z-Wobble/Banding problems on my A1 Mini, previously the prints were nearly perfect :c
It is the most visible when printing multiple objects
I tried temperature and flow calibration, lower speeds, different filaments, lubricating, tensioning belts

Printing hours: 509h
Slicer: BambuStudi
Filament: SUNLU Meta / BambuLab PLA Basic / Other cheap basic PLA
Nozzle: 0.4mm
Print speed: Outer wall: 60, Inner: 150, Infill: 180, Gap Infill: 230
Retraction settings: Length: 0.8 Speed: 30 Deretraction speed: 30; Z-Hop: Auto, Z-hop height: 0.4



I get this very heavy on both my A1 mini and A1 after about 3 inches in height. have from the very beginning but not sure why either.

Did you try contacting support this this? :confused:

No, I should. Mainly never needed to go that high. But recently I was printing a die for a car panel and the lines were so dang bad.

My mini does the same thing although not this bad. I contacted support and they couldn’t resolve it. They sent me a model which, of course, printed fine. I believe the extruder motor is overheating. What I’ve noticed is that the first few prints of the day are perfect. But the longer I print continuously, the worse the print quality gets. And the extruder motor gets so hot you can’t touch it.

Hey, I have the same problem with my A1 Mini. Unfortunately, I’ve had it since the first print.
I haven’t found a solution yet, but I hope someone can find a solution here.

Get a brand-new (preferably name-brand) microSD card, recreate the filesystem and retry your prints. I had the same on my A1 intermittently, destroying print after print. Thought it was the USB cable, but nope: shipped with bad-quality SD card.

After my experiences with resin prints failing for the same reasons, I don’t know why I didn’t just replace this one out of the box.

If my printer would print like that from the first print, I would return the printer :confused:

No difference with a class 10 SD. I have opened a support ticket and will see what happens.

That’s a bummer.

Your comment on the extruder motor temp is a bit worrisome, for sure. That’s the one symptom I didn’t have. Print behavior/banding look the exact same (I had some layer skipping, too).

Hopefully the support ticket resolution fixes your issue. Let us know what it ended up being.

same problem but more chaotic

This happened when I printed a scaled-down version of my BMW with a 0.2 mm nozzle. I printed the same model with a 0.4 mm nozzle, and there was now issue.

I have had the same problem, and i do every calibration, cleaning, tighten the screws…

I have tried something from an other post maybe it will help you too.

global settings. others › gcode output > uncheck reduce infill retractions.

Works for me.

(Sorry for my bad english)