Check if the print head is shaking. If so, adjust the hexagonal spacer column behind the print head.
Check if the printing platform is shaking. If so, adjust the hexagonal spacer column under the printing platform.
Check if the quick-release hot end is loose. If the quick-release hot end is loose or there is filament residue on the nozzle, the nozzle may press down on the hot bed or scrape the model during printing, causing printing failure.
Check the quick-release nozzle and insert it into the heat sink until the throat step surface is flush with the heat sink.
Move the print head module above the ejection mechanism to check if the movement interferes.
Check whether the clearance elimination component is installed properly and whether the component positioning pin is correctly inserted into the gap of the fixing part.