The model prints with layer compression, and the Z-axis does not lift during the printing process.
The Z-axis fixing screws are loose, causing inaccurate Z-axis movement precision and precision deviation.
The filament is tangled on the filament spool holder, preventing the Z-axis from lifting normally.
Whether the nozzle has fallen off and whether the assembly is in place.
a. Tighten the Z-axis fixing screws and the fixing screws at the top of the Z-axis lead screw.
b. Check whether the filament is tangled on the spool holder, preventing the Z-axis from lifting normally.
c. Remove the silicone sleeve, check whether the nozzle is properly assembled, and reassemble by referring to the after-sales tutorial.