Help...Rough print problem and cannot get to bottom of it !%!

Hi
I am having problems printing not just the photo file but most others as well with similar error.
I have tried:
Cleaning nozzle with needle
Re-calibrating
Cleaning all slide rods
Greasing screws
Re-tensioning all belts (inc Z)
Factory reset
Extruder gear is clean and OK

I use Bambu PLA Matt (Fresh roll and in a sunlu filament drier) and have tried standard 0.2mm config, 15% infill, gyroid and many others but still the same rough infill and banded/rough walls.
Benchy and test print are also pretty poor
First layers seem OK (although one time it ripped) but then it goes weird like pictures.
Printer was working fine since new a few months ago then this after not using for a couple of months

Any ideas?
I have a new extruder and nozzle assembly on order just in case but it hasnt been used much.



Hi there, welcome to the forums.

Could you provide more information on what you’re trying to print?

Can you give us more information about the nozzle (and nozzle settings of Bambu studio) and the same for the print bed (and settings in Bambu studio)?

The second picture looks like potentially a failed cooling fan, have you checked that?

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The cooling fans are fine

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The nozzle is the standard 0.2mm and bed is PLA/PEI textured plate

The prints are terrain tiles for wargaming. They are 6" square (see attached)

Settings are system standard 0.2mm apart from ironed topmost layers and gyroid infill. i have also tried 0.08mm and adaptive layers (which is what I would like to use on these) but all similar results

You provided a good deal of settings information however, more diagnostics steps are needed before we can fully help you. However, just the Benchy alone tells a lot.

Have you dried your filament? Did you weigh it before and after drying to confirm how much moisture was removed. I ask because there are so many issues with your filament calibration just on the Benchy alone but moisture is the first thing to rule out. Factory sealed filaments are often moist, so don’t trust what came out of the bag. If it doesn’t print perfectly after unsealing, assume that the spool is wet and weigh it, dry it and weigh it again to ensure that it is dry.

Before I go into a lengthy list of troubleshooting tests, let’s first make sure your filament is dry. You’re already at a disadvantage because you’re using matte filament which has challenges of it’s own.

Here are some extreme examples of dry vs not dry. The three examples are Clear PC filament, White PETG, and Bambu gold Silk(since discontinued) Silk has many of the same problems that matte has. I’ll let you guess which model was printed after the spool came out of the dryer. :wink: ALL were factory sealed filaments. Click on each for full photo.

After you dry the filament. Rerun your Benchy and also run a cube primitive. Clean Benchy should look more like this:

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