Low quality prints and seams, especially with threads

Bambu Lab X1 Series Troubleshooting
1

I’m not getting the best quality prints from my X1C. I’m not exactly sure what the culprit is, maybe the seams? This is mostly an issue when I print small round things that need to fit together; like threads. I also have a Prusa and can make threads all day that fit together just fine, but when I print them on the X1C I have to clean them up with a tap and die. Here is a side by side comparison of a small screw that I’ve printed with the the Prusa (left) and the X1C (right):

PXL_20230522_173730405.MP
PXL_20230522_173730405.MP1920×1446 210 KB

Settings are essentially the same, both printed in PETG. Any help would be much appreciated.

2

Using Orca slicer and turning off wipe on loops definitely helps. I’d say the quality is still not quite up to Prusa level, but the parts fit together and work.

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3

Did you calibrate your filament in Orca? It makes a world of difference most of the time.

4

I did, although it didn’t make a huge difference.

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5

Hello,

What nozzle temp you running on the Prusa and speeds ?

Are you using variable layer height ?

You might have to adjust your shrinkage on the Bambu lab also.

6

It’s all pretty much generic settings on the Prusa: 240 C on the nozzle and stock speeds. The bambu is running faster of course, although I haven’t notice any improvement between standard speed and stealth at 50%.

I don’t use variable layer height. How does one adjust for shrinkage?

7

The Prusa slice might have the petg volumetric speed set to 8 or 10 but we need to know the speeds on both slicer on your part to help see what both slicers are doing this way we know what’s going on with speeds they should be about the same on this small part but it would be good to know when trying to find solutions.

Being this is a small part and slow printing speeds you can drop the nozzle temp down to help with the overhangs this is one reason the Prusa part is better.

Using a layer height of 0.16 will help with overhangs or use the variable layer height tool.

This is the Shrinkage test you can do.

OrcaSlicer V1.6.3 beta has Orca Tolerance Test

Dimensional Calibration Testing

Or you can measure your part and adjust shrinkage or compensation settings as needed.

8

I am having some issues with threads also. They look better than those pictures, but not good enough to use.
They are Acme threads and I do not have a tap/die for that.
It it mostly the overhang that seems to be the problem, I tried slowing it down and smaller layer, but it did not seem to help.

I am fairly new to this, so appreciate any help.

(Parts made in Fusion 360)

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9

Try to slow the volumetric to 5

10

Have the same issue with the acme threads from fusion on the A1mini. Print great with cura and my other brand printer. Were you able to ever find a solution?

11

For acme threads I’d use 0.12mm or less layer height since the overhang angle is 29 degrees.

12

What helped for me was changing the “order of walls” setting; from “outer/inner” to “inner/outer”. My thread was a bit bigger but not that much I think (just based on the picture). Printed in Sunlu PETG, 0.2 on a 0.4 nozzle. Basic PETG setting in BS

13

What’s the diameter of the thread?