Resonance frequency of carriages for linear roller guides

This paper describes the vibration responses of a single carriage of linear roller guides. Excitation was conducted by an impulse hammer through a block fixed on the carriage and its response was detected by an accelerometer and a sound level meter. Both of acceleration and sound pressure were analyzed by an FFT analyzer. The resonance frequencies of four carriages were measured changing the number of roller inserted into the carriage as well as the mass of the block. From the experimental results, it is found that the resonance frequencies are dependent on the number of rollers. It is supposed from the experimental results that the number of rollers contacting with the race way of the carriage governs the resonant frequency. Then, the surface profile of the raceway of every carriage was measured by means of a surface profile measuring instrument with stylus method. It may be pointed out that there is a possibility of influencing of the surface profile of the race way on the resonance frequency of the carriage. If this impulse excitation is adopted for the inspection of the carriages, the straightness of the race way could be checked by measuring the resonance frequency.