During the K1 Max power-on self-inspection process, the nozzle fails to home after the printing platform rises, and the extruder hits the frame when the self-inspection gets to leveling step.
If you find that the terminal is loose, plug it in again, and click to return to zero, and observe whether the homing is normal. For example, check whether the wiring at the X motor is intact and whether the terminals are loose; check whether the wiring at the Y motor is secure and whether the terminals are loose. As shown below:
If the motor wiring is in good condition, it may be a problem with the main board and/or the driver. At this time, check the error code feedback on the screen. When the 2505 error code pops up on the machine screen, the main reason is that the main board fan screw is against the main board's X-axis drive heat sink. Such a contact in the long term leads to damage to the driver chip; another situation is that the driver chip is soldered incorrectly.
There may be three solutions depending on different scenarios. First try to remove one of the fan screws, which can prevent the driver IC from being damaged due to the contact of the screws with the heat sink. If long-term contact has caused the motherboard fan wire to be damaged, the motherboard fan needs to be replaced. If none of the above applies, you may need to replace the motherboard of the machine. At this time, you need to contact the official after-sales service to replace the K1 Max motherboard (within the warranty period).