Involute CAM is an important attachment which produce involute profile in the copying geargrinder; the accuracy of which directly decide the profile accuracy of gear which is grinded.
渐开线凸轮是靠模式齿轮磨床生成渐开线齿形的重要附件，其精度直接决定着被磨齿轮的齿形精度。
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This paper analyzes the modal of Y7125 geargrinder spindle, gets out the main four stages of spindle vibration frequency and deals with the data.
This paper is taking gear grinding as example, use gear engagement principle to establish the coordinate Y7125 geargrinder, deduced line formula for gear grinding engagement.