If the linear module can only move in one direction, the issue is related to the end-stop switch.

When the carriage/slider of the issue linear module is stuck and cannot move to another direction, use a USB cable to connect the machine to the computer.

Please connect the machine with your PC via the provided USB cable.

- Launch Snapmaker Luban
- Select the correct serial port
- Input the command in the console

In Luban console, input M119.

If the X linear module can only move in one direction, the X_min or X-max may show TRIGGERED.

Similarly, if Y or Z linear modules can only move in one direction, please check whether y_min, y_max, z_min, or z_max show TRIGGERED.

Please follow the below step to fix the end-stop switch.

1. Dismantle the cover without a cable end of the faulty linear module. You may need the 2.5 & 2.0 hex screwdriver.

2. Here is the end-stop switch.

3. Check if the end-stop switch is stuck.

4. Use a stick to remove the grease on the switch and assemble the linear module to check whether it works.

If the tips above cannot help, please contact support@snapmaker.com