First lines are not printed. about marlin-ai3m HOT 5 CLOSED

Didn't extrude as well for me. Found the issue: As I mentioned in the description, the parts cooling fan is way stronger now on the full 12V, so you'd need limit it to around 60-70% if you are using the stock cooler. The nozzle cools down too far and the console reads

Send: N634 G1 F1800 X113.429 Y107.753 E80.2099*13
Recv: echo: cold extrusion prevented

Anyways, since you are printing at a fairly low temperature already - I guess you're printing PLA - I'd recommend not going for full cooling on the first layer already, since that can cause warping. My recommendation would be something like this:

1. layer: 0% fan speed
2. layer: 30% fan speed
3. layer: 45% fan speed
4. layer: 65% fan speed

Please report back if you're giving this firmware another try. For now, I am closing this issue since the reason was found, please feel free to reopen it if the issue still persists for you on adjusted fan settings.

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Can you please send me that particular GCode so I can try it out myself?

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Uploaded it

xyzCalibration_cube.zip

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Thanks a lot. I reflashed the FW with the new Fan settings and it works now as expected.
Thank you for the gread work and i wish you an "Frohes neues Jahr" 👍

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That's good to hear. Ebenso! 🎉

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