Abstract:
The impediment for developing the read-write head test procedure using spinstand is the vibration of Head Loading Mechanism assembly (HLM assembly). This vibration caused by the spinstand induces track profile error of Head Gimbals assembly (HGA) during the read-write process. The aims of this dissertation are to study the vibration behaviors of spinstand and the dynamic response of HLM assembly using Finite Element analysis. According to the investigation, it was found that the read-write errors were due to the relative movement between HGA and the media storage. Two sources of vibration were the whirling of spindle motor axes, which causes vibration in media storage plane, and the dynamic responses of HLM assembly, having displacement amplitude in both the media plane and perpendicular to the media plane. The consequence of the analysis can use as a guideline to avoid the resonance by altering the natural frequencies of the HLM assembly from the spinstand operating frequency, which is 120 Hertz. In addition to track profile error reduction, the spinstand performance was increased. Clearly, this could alleviate the testing equipment expenditure required for new model of HGA in the production line.