Very bad quality after first layer

Hello there!

I’m not sure what changed, but today I’m getting very poor print quality after the first layer when using Ludicrous Mode:

The white filament is BambuLab’s, and the red one is Prusament.

I often use Ludicrous Mode when prototyping or printing small test samples of my models, but this issue just started happening today.

Any idea what might be causing it?

You answered your own question. Your print is going way too fast.

You were probably getting away with it with smaller models because the printhead was not accelerating up to full speed as like in this model.

You can try changing the heating, cooling, and flow rate, but the speed is the main problem here.

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Ah, I see… that makes sense!

I honestly thought Ludicrous Mode would still keep things within an acceptable quality range. I expected some loss of quality compared to standard speed, but I didn’t imagine it could get this bad.

Thanks for the explanation! I’ll definitely keep that in mind for future prints.