The role of linear guides in 3D printers is mainly to support and guide the movement of the print head, thereby ensuring the accuracy and speed of 3D printing. In FDM 3D printers, linear guides are mainly used to support and guide the movement of the print head. By selecting appropriate linear guides, the stability and accuracy of the print head can be ensured, thereby improving printing quality and efficiency. In addition, the selection and installation of linear guides can also be optimized according to different printing materials and print heads to meet different printing needs. In short, the role of linear guides in 3D printers plays a vital role in achieving high-precision printing effects. ​