Measuring method of turntable eccentricity error

Abstract

The invention relates to a method for measuring the eccentricity error of a turntable based on the photoelectric detection of the modulation cycle. The photoelectric detection device for the modulation signal cycle of the rotary shutter is used to continuously measure the cycle value of the modulation signal of the turntable in each modulation cycle through a counter. Detect the change of the cycle value to calculate the eccentricity, and calculate the eccentric position by using the cumulative value of the detected cycle value within half a cycle of the turntable to provide a basis for the coaxial adjustment of the turntable components. It provides an efficient and high-precision measuring device and method for the eccentric error detection of turntable components, and is suitable for the engraving of turntable parts with evenly distributed score lines or teeth on the circumference of circular gratings, mechanical modulation discs, and photoelectric encoder code discs. Eccentric error measurement of wire circumference or component installation. The device has the advantages of high precision, simple operation, easy realization of the method and low manufacturing cost.

Description

technical field [0001] The invention relates to a method for measuring installation errors of turntable components such as a circular grating, a mechanical modulation disk, and a photoelectric encoder code disk. In particular, a method for measuring the eccentricity and eccentricity of the engraved circumference of a turntable part with evenly distributed engraved lines or teeth on the circumference or the installation of components. Background technique [0002] When the turntable (rotating disc) is installed, there is an installation error with its rotating shaft, which is mainly due to the coaxiality error caused by the eccentricity between the turntable and the rotating shaft. The error directly affects the working stability of the turntable and the accuracy of the output signal, so the detection and debugging of this error is a necessary work for the production of turntable components. [0003] The existing eccentricity measurement methods for turntable components incl...

AI Technical Summary

Problems solved by technology

This method can be used to measure the eccentricity error of a high-density uniformly scribed disc, but it must have a matching readhead to acquire two sinusoidal signals, as well as an oscilloscope or other equipment that can synthesize Lissajous figures, and for less scribed lines or teeth The turntable parts, the measurement accuracy is not high

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