1. Check whether the mirrors are loose, tighten them if so. 

2. Check the carving speed. Set it over 150.

3. Open the software and adjust the PWM for the X-axis motor (as shown).

• Access "Vendor param" (password: rd88888).
• Click "Motor".
• Sequentially click "X", "Y", "Z" (if applicable), and "U" (if applicable).
• In the window that opens, tick the box before "PWM rising edge valid" if it is not ticked. Untick it if it is ticked (as shown).