No longer prints correctly, looks as if it has a clogged print head but I’ve replaced with complete hotend twice. Replaced with a new extruder unit and bypassed the AMS and fed filament directly into the print head. used a filament dryer and multiple unopened rolls of filament. I have three other X1 and print fine with the same file and filament. Any suggestions much appreciated.
That looks like it could also be a filament binding issue. Do you have an AMS? If so, have you tried to feed the filament directly and rule out the AMS? Next, I might suggest to look at the PTFE tube and ensure that your tube isn’t binding the filament. This has been documented here in the past by others who disconnect their tube and somehow did not correctly seat it when reattaching it.
One easy test you may want to try is a whole sheet first layer test. You can download one on Printables but here’s the quick way.
- Right-click on the slicer and select a Cube Primitive.
- Click on size and make the cube primitive 240x240x0.20mm. This will create a sheet one layer in height. If that does not come out smooth, then you have either a feed problem or a filament tuning problem.
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Bypassed the AMS and did the whole sheet test. printed fine but when I go to print the 3D Benchy again it does the same thing.
Is the part cooling fan running while it’s printing?
Could you please share the following information?
- Filament type and brand
- .3mf file or screenshots of the settings used
Based on the picture provided, it seems like the filament temperature is too low, volumetric speed is set too high or there is a partial clog in the extruder or hotend.
Usually, this occurs if the incorrect filament profile is used (Bambu PLA profile instead of Generic PLA profile). Some Generic filaments don’t support high-flow/high-speed printing, so they are not compatible with the print settings in the profile.
You can first try with the default Generic PLA filament and see if this improves the print quality.
If the first layer sheet printed correctly, it is probably because the print speed is much lower on the first layer, allowing the filament more time in the hotend to melt and also not reaching the maximum volumetric speed set in the profile.
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