Z banding/ layer inconsistencies on the A1 printer

Hi, these are my object


I have already cleaned the serrated pulley that feeds the filament into the extruder. Additionally, I tried printing without using AMS Lite and noticed a slight improvement. I also attempted to enhance the grip of the serrated pulley for a more consistent flow, but unfortunately, there was no change.

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What filament are you using and is it a consistent diameter? Have you calibrated it?

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I use PLA+ SULNLU, PLA MATTE Overture, PolyTerra & Bambu Lab, Avery filament give me this problem (1.75mm diametr of filament)

Have you calibrated the filament? Honestly those prints don’t look terrible. Printing at a slower speed can often help.

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yes, i did the calibration in Bambu Studio & in Orca Slicer with the tutorial, these object are printed with 100 mm/s for outer walls


I have a similar problem; as soon as there is a change in the geometry during layer construction, these inconsistencies in the z-layers occur. For example, in the area of the whiskers on your cat. Unfortunately, I haven’t found a solution yet, so I’m also very interested in reading :slight_smile:

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The error on Z, on top to the whiskers of the cat is caused by an imprevist of printing, the printing did stop for a few minute and the layer was too cold for the restart. might be the same for you.

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The print was actually runs through. I have this issue with all my parts with holes or geometric changes. Sorry, then I will open a new topic. Good luck finding a solution :slight_smile:

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I have similar lines appearing on a model, ON all sides. Bambu A1. Is it model related?

You could try to print the outer wall first. That helps for many of my models.

This isn’t the correct topic for this “error”, but I think it is only the STL file the design of the project.

Maybe there are perpendicular walls behind of the wall you take for the photo, it’s similar to the ghosting.

I already tried, but it fixes it slightly almost imperceptibly

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For me this is the start of my research:

Printing Setting

  • Walls Loop 3
  • Top Layers 0
  • Bottom Layers 2
  • Infill 0
  • Outer Walls Speed 200
  • Inner Walls Speed 200

Turn of on the setting of the filament:
Auto Cooling in Filament Settings

This morning, I disassembled the extruder part to check whether the pulley was damaged, dirty, or had any other issues. Unfortunately or fortunately, I didn’t find any defects inside. Another possibility could be related to the motor , which might have a defect and therefore not perform the correct steps or other operations. Currently, I’ve observed significant overheating of the extruder motor, presumably ranging from 80°C to 90°C, at the end of a print.

These are immgaes of the extruder part


For best quality I think you have to slow down your “outer wall speed”, try 80mm/s. There IS a trade off that comes with speed.

Thinking about it, I have never lowered the printing speed so much, now I am trying to print the Bambu Studio cube, as I usually print at a speed of 200 mm/s, then I will try to lower it and see what comes out.

Although the cat print (first photo posted in this thread) is:
layer 0.16
outer wall speed 100

if I remember correctly.

are you printing dry filament out of a filament dryer? fresh spools (no matter what brand) come wet out of factory. especially when they are on paper spools.

Yes, no metter the if the filament is dry or not.

These are the filamet I used.
Also PETG by Makeeasy dried.

Hi, did you find the solution? Because I have a similar problem on almost one week old A1 printer. I printed the same model twice and the bands are in different places(there are a few common bands but mostly they are in other places).

I have a similar issue with my A1 mini that I’ve had for 3 days. I don’t know why this is happening either, it’s been happening ever since I received the printer.