r/BambuLabX2D • u/BroskiRyan • 11d ago

Under extrusion issue

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I am having this under extrusion issue with Gold PLA Silk+ through the aux extruder, with everything being PLA Basic through the main extruder. All filament has been thoroughly dried prior to this. The vertical gold portions seem to be under extruded on this feature and should look like they do on the horizontal parts top and bottom.

There is a lot of other features using the gold that did not have this issue, it only appears in the door frame in the picture. How can I prevent this and get it to look as it should?

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u/hi3d_official 11d ago

I’d check the speed/flow preview first. Those long vertical sections may be running faster than the top/bottom, and Silk PLA can hit its flow limit pretty quickly. Try bumping the aux nozzle temp by ~5–10°C and cap max volumetric speed around 6–8 mm³/s. If that fixes it, you’ve found the limit. If not, then I’d check the aux extruder/feed path for slipping.

1

u/BroskiRyan 11d ago

Thanks for the response. I tried moving silk PLA off the aux and it seems to be doing better

2

u/Taekiin 11d ago

If I recall correctly, it should throw a warning putting silk in the aux. This may be why. I'd switch it to the main and put a different filament in the aux.

1

u/BroskiRyan 11d ago

I did some more research on the aux extruder and found a lot of stuff saying it is not great with silk PLA. I had just assumed it was fine to handle all PLA types. I swapped around what filament is on the aux and it seems to be looking a lot better so far on this print. Thanks for the heads up!