Odd movement after bed leveling

[borisw37]

Brand new X1C w/ 3DHUB PEI plate.
Printer seems to some weird movements between bed leveling routine and the flow calibration.

I’ve sliced a plate that looks like:

After bed leveling, the printer moves the nozzle to front-right, extrudes or oozes some filament then proceeds to run an outline of the future print but ~2mm above the plate.

In this case it actually dropped a pieces of the filament onto the build plate where the part will be built later.
Starting at 3:24
Finishes bed leveling and wipes at 3:34
Moves front-right: 3:45
Weird movement 3:45->3:57

Odd movement on X1C after bed leveling

Is this normal? Whats the purpose? Should the nozzle be clean for this movement?

[maruccimike60]

Does it do the same thing with the Bambu build plate that came with the machine?

[borisw37]

Just checked using the “engineering” plate. And the machine performs the same odd movement.

[maruccimike60]

Try doing the full machine calibration again with the original engineering plate.

[Testurbator]

It scans the buildplate using the lidar to make shure that the region where it will print are free of any old prints or dirt

[msinger]

@borisw37

In this case it actually dropped a pieces of the filament onto the build plate where the part will be built later

The filament just randomly fell off the hotend at that point. The real issue was that it did not properly clean the tip when it attempted to do so here. You can see the filament hanging to the side of the hotend after the wipe process completes.

You can either update the G-code to make the hotend wipe more consistently or have your tweezers ready to manually clean up the hotend when needed.

[borisw37]

@msinger, @Testurbator

Thank you for the explanation, that makes sense.
It actually looks like it wiped (not very well), then more filament oozed out to create that curly-q.

Are the wipe settings something I can change in the slicer (bambu-lab), or is that a post-process g-code change?

[msinger]

@borisw37

Are the wipe settings something I can change in the slicer (bambu-lab), or is that a post-process g-code change?

That’s part of the Machine start G-code here:

[s.3]

You can also lower the nozzle temp for first to stop the oozing.

[msinger]

@s.3

You can also lower the nozzle temp for first to stop the oozing

Was it oozing? Or did the filament get stuck on the nozzle when it attempted to wipe? It’s hard to tell.