Nozzle scratched build plate during calibration

Flagship K Series Creality Flagship K1 & K1C
1

Hello!

I have a problem with my K1C purchased in December 2024. About a month ago, during the pre-print calibration phase, the nozzle deeply scratched the build plate and got stuck. I had to turn off the printer because the extruder kept trying to move, making the situation worse.

I replaced both the nozzle and the build plate and tried printing the same file again without changing any printer settings, and it calibrated and printed successfully.

Everything went fine for another 30 prints, but then the exact same issue happened again, once more during the pre-print calibration phase.

Can you tell me what is going on? Why does this happen during calibration? I don’t want to buy another build plate or nozzle only to have it ruined again :frowning:

The firmware is up to date, as is the slicer. Between the two incidents, i didn’t change any printer settings!

I’m attaching 2 pictures of the scratched build plates.

17566678050418216910143002305705
175666780504182169101430023057051920×1446 240 KB

17566678965136223261101285536899
175666789651362232611012855368991920×1446 120 KB

2

I think you may have to contact the Customer service. It could be related to the Strain gauge that allows the bed leveling.

In fact, I don’t see how it could not be related to the strain gauges since it’s doesn’t seem to be the firmware (that would happening a lot more)

EDIT :
To be honest, the more I think about it, the less logical it is :sweat_smile:
I was thinking about the Z-axis lead screws but it is illogical to get this issue after 30 prints
Same for the stepper motors, if a pinion gear is broken and thus missing a step on the Z-axis, you will have this issue everytime…

Concerning the firmware, that’s the same reason. I don’t see why it would be glitching every 30 prints

So it’s either the strain gauge or the nozzle (since both are working together to get the bed leveling).
If the nozzle seems fixed (not wobbly), my conclusion is on the strain gauges under the bed

3

I appreciate your reply, I’ll reach out to customer support as you suggested!

4

Nope, the nozzle is not wobbly (and it was also replaced between episode 1 and episode 2), so I believe it’s as you say.

Considering that this happens when the printer is performing its calibrations before starting the object print (I’m referring to the movements where it taps the bed multiple times) your theory makes even more sense.

1 Like
5

That happened to me. Creality sent me a new build plate under warranty.