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A Multi-probe Measurement Method to Evaluate the Yaw and Straightness Errors of XY Stage on High Precision CMM

机译:评估高精度CMM XY平台的偏航角和直线度误差的多探针测量方法

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摘要

To develop a high precision Micro Coordinate Measuring Machine (Micro-CMM), it is important to evaluate an X-Y stage on the Micro-CMM. A precision multi-probe measurement system has been designed and developed for simultaneously measuring the yaw and straightness errors of the X-Y stage. In the system, an autocollimator measures the yaw error of the stage, and two laser interferometers measure the profile of a standard mirror which is fixed on the X-Y stage. The straightness error is reconstructed by the application of simultaneous equation and least-squares methods, and the uncertainty associated with the multi-probe method is simulated. When the interval of the laser interferometers equals 10 mm, the standard deviation of multi-probe method using the high accuracy autocollimator and the laser interferometers is about 10 nm. The simulation results satisfy our purpose for the uncertainty of 50 nm, and practical considerations are discussed.
机译:为了开发高精度的微坐标测量机(Micro-CMM),重要的是评估Micro-CMM上的X-Y平台。设计并开发了一种精密的多探针测量系统,用于同时测量X-Y平台的偏航角和直线度误差。在该系统中,自动准直仪测量平台的偏航误差,两个激光干涉仪测量固定在X-Y平台上的标准镜的轮廓。通过应用联立方程和最小二乘法重构直线度误差,并模拟了与多探针法相关的不确定性。当激光干涉仪的间隔等于10 mm时,使用高精度自动准直仪和激光干涉仪的多探针法的标准偏差约为10 nm。对于50 nm的不确定度,仿真结果满足了我们的目的,并讨论了实际考虑因素。

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