Z-axis stuck

1. Check if the maximum Z-axis height in parameter settings is normal (usually 200,000), then try zeroing.

2. Confirm the mechanical parts reset properly. Power off the printer, firmly push down the Z-axis arm, then power it back on; it's normal if the Z-axis rises.

3. Refer to the port settings on the main interface, select port COM1, and restart the software.

4. Check if the reset sensor and light-blocking plate are secure; they may be loose or in an abnormal position due to over-resetting. If the above methods fail, the core board may be faulty; contact after-sales engineers to replace the problematic parts.