Analysis of faults in linear guide crawling

Time:2025-10-15   

1、 The assembly accuracy of machine tool components is low, the rigidity of the transmission structure is poor, and the transmission force is insufficient

During the assembly process of the transmission structure components on the machine tool, factors such as poor coaxiality and parallelism, or overly tight adjustment of the linear guide plate can lead to an increase in frictional force in the transmission system, a decrease in transmission force, and the resulting crawling condition of the linear guide; The original design of the machine tool had poor rigidity in the brackets or fasteners of the transmission components, which easily led to elastic states under transmission pressure and could not smoothly transmit torque. Due to the excessive transmission levels, frictional resistance offset some of the transmission force, resulting in insufficient transmission torque and causing crawling of the linear guide surface.

Hiwin HG Series Linear Rails

2、 Rotating parts are not balanced

The high-speed rotating components on the machine tool have not undergone dynamic balancing treatment. During high-speed rotation, centrifugal force occurs due to dynamic point imbalance, resulting in mechanical vibration waves and crawling phenomena in the vibration waves and linear guide parts.

3、 Hydraulic system pipeline leakage

Hydraulic systems are usually composed of components such as oil pumps, pipelines, control valves, and oil cylinders. Any poor sealing in the system can lead to leakage, causing a decrease in oil pressure and insufficient power, resulting in crawling. The sealing ring of the oil cylinder end cover is worn out after long-term use. If it is installed tightly after replacement, it will also increase the frictional resistance, directly affecting the lack of power and causing crawling.

HG Series,Linear Rails

4、 Lack of oil or improper use of lubricating oil or oxidation and deterioration on the linear guide surface

The linear guide surface of the machine tool requires sufficient lubricating oil to ensure that the oil film plays a role in lubricating and reducing friction. Once the oil level is insufficient, it will cause local dry friction on the surface of the linear guide rail, which is inevitable for the linear guide rail to crawl. Another point is that when there is no oil dry friction, it is easy to cause the friction surface to bite and strain, resulting in a rough surface of the linear guide and increased local friction, which prevents the worktable from maintaining a constant speed and causes crawling phenomenon.