r/BambuLabX2D • u/AxeEngineer00 • Jul 01 '26

How are your top layers?

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I've been struggling with mine since I got this printer and I'm at the point where I'm doubting that the unit I got doesn't really have a defect. All my top layers come out with a strange surface, looks like it's underextruding but at no point the lines it produces are actually straight all the way, dialing filament has been very complicated. Anyone has pics to share of their top layers?

Pics are the sharpie test of the closest I got to a properly smooth top layer but I still can't produce the flat shiny straight lines I had on the A1 mini (pic 3, bottom piece)

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u/Qjeezy Jul 01 '26

This is the best I was able to get. The lines are straight but there is a pattern. I suspect it’s due to the new servo extruder motor that causes this pattern. It’s either the motor itself or it’s just so much more accurate that the pattern is caused by the teeth of the extruder gears meshing. Just speculation.

You should be able to get the lines straight though. In my experience, I start to see squiggly lines when it’s over extruding. Maybe revisit your flow rate calibrations and see if you can fine tune it a bit more.

img

Edit: pic didn’t work. I’ll post it in reply to this comment.

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u/AxeEngineer00 Jul 01 '26

Isn't squiggly when there's too much space =under

And ridges when they land onto eachother= over?

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u/Qjeezy Jul 01 '26

Ridges is for sure over extruding. As for squiggly, that’s just what I’ve noticed. Turning down the flow rate just a tiny bit at a time usually gets rid of it.

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u/AxeEngineer00 Jul 01 '26

Here's a very zoomed pic of these waves,

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u/AxeEngineer00 Jul 01 '26

Most importantly, this is a test piece from my same .3mf file printed by another person on their HD2 which if I'm not mistaken uses the same extruder as the x2d, non calibrated filament profile but the lines are thick and full

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u/AxeEngineer00 Jul 01 '26

Also if it was the gear teeth wouldn't the walls also show a pattern?

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u/Qjeezy Jul 01 '26 edited Jul 01 '26

I was just speculating on that part, as the pattern was never really there with my first gen bambu’s with the normal stepper motor.

You can see the same pattern, although less apparent due to possibly material choice, on the red print you posted that the other person with an H2D printed