① Reduce material waste: No need to print additional support structures, which can save materials and reduce waste after printing.

② Simplified post-processing: Due to the lack of supporting materials, cleaning after printing is easier and faster, without the need to remove supporting structures.

③ Improve printing speed: eliminates the need for supporting structure design and printing time, enabling faster completion of the entire printing process.

④ Improving surface quality: The supporting structure may leave marks on the contact surface, and unsupported printing can avoid this situation and improve the surface quality of the finished product.