What are the general requirements for linear ways cnc?

CNC machine tools for linear ways cnc:
1. Guide accuracy
High guiding accuracy refers to the accuracy of the linear ways cnc motion trajectory, which is an important precision indicator of the guide rail pair. The smaller the deviation between the actual movement trajectory of the moving member and the given direction, the higher the guiding precision. The main factors affecting the guiding precision are: the geometric accuracy of the guiding surfaces of the linear ways cnc, the type of the structure of the guide rail, the contact precision of the guide rail pair and the surface roughness; the stiffness of the linear ways cnc and the support; the oil film thickness of the guide rail and the oil film stiffness; Thermal deformation of the guide rail and the support member, and so on.

The geometric accuracy of the linear ways cnc generally includes the straightness of the guide rail in the vertical plane, the horizontal plane, and the parallelism between the two rail faces or the twist value of a certain length between the two rail faces. The accuracy requirement can be expressed by the error over the full length of the linear ways cnc or the error S per unit length.
2, mobile sensitivity and positioning accuracy are high
The moving sensitivity (moving resolution) refers to the shortest distance that the workpiece table can achieve by one movement. The positioning accuracy refers to the ability of the workpiece table to stop at a specified point by the motion state. The motion sensitivity and positioning accuracy are related to the type of linear ways cnc, friction characteristics, motion speed, transmission stiffness, and moving parts quality.

3. Smoothness with low speed movement
The smoothness of low-speed motion refers to the phenomenon that linear ways cnc does not cause crawling and other discontinuous motions during low-speed motion or slight movement. It is related to the structure of the guide rail, the matching of the material of the guide rail, the lubrication condition, the nature of the lubricant and the rigidity of the linear driving system.
4, the stiffness is large
The deformation of the linear ways cnc will affect the relative position and guiding accuracy between the components. Stiffness is especially important for high precision machinery and instruments.

5, good vibration resistance, vibration resistance
Mainly refers to the ability of linear ways cnc to resist vibration and self-excited vibration. For the closed-loop control system, not only the linear ways cnc is required to have high tracking sensitivity for starting and braking, but also it is required to have appropriate viscous damping characteristics to prevent instability during starting and braking.
6, small fever
At high speeds, the heating of the linear ways cnc is required to be small.

7, long-term accuracy
The linear ways cnc accuracy can be maintained for a long time, mainly depends on the wear resistance of linear ways cnc and the dimensional stability of the guide material. The wear resistance is related to the material matching condition of the guide rail pair, the force condition, the machining accuracy, the lubrication method and the performance of the guard device. The residual stress of the linear ways cnc and its support member also affects the precision retention of the guide rail.

ZYSL company specializes in linear ways cnc for many years. All raw materials and accessories have been carefully selected to ensure a good user experience.

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