Self-adaptive follow-up device for open type grating reading head

Abstract

The invention relates to devices in the technical field of photoelectric signal detection, in particular to a self-adaptive follow-up device for an open type grating reading head. The self-adaptive follow-up device solves the problems that the installation structure of an existing grating reading head is not easily adjusted, and the grating reading head cannot adapt to the external factor change, so that the distance between the grating reading head and a grating ruler cannot be automatically adjusted. According to the technical scheme, the self-adaptive follow-up device for the open type grating reading head comprises a rotation stopping sliding shaft, a guide post, a guide sleeve, a retaining ring, a rolling body, a spring, a reading head installation machine base, a guide lever supporting base, a guide lever, the grating reading head and a support assembly. The self-adaptive follow-up device can be installed on rotary body class parts and linear guide rails as well, when the guide rail shape changes or the temperature of the surrounding environment changes, the self-adaptive follow-up device for the open type grating reading head can also guarantee that the grating reading head is in an optical working state, and the adjustment principle is the same as above.

Description

technical field [0001] The invention relates to a device in the technical field of photoelectric signal detection, in particular to an adaptive servo device for an open grating reading head. Background technique [0002] Gratings are widely used in the fields of CNC machine tools and precision measurement due to their advantages of high resolution, large measurement range, wide dynamic range, high detection accuracy, fast response speed, etc., and are easy to realize digital measurement and automatic control. The grating is mainly composed of two parts: the scale grating and the grating reading head. The scale grating is generally fixed on the movable part of the machine tool, and the grating reading head is installed on the fixed part of the machine tool. During detection, the grating reading head reads the optical signal on the scale grating and converts it into an electrical signal. According to this electrical signal, the realization Detection of displacement. [0003]...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the defects that the installation structure of the existing grating reading head is not easy to adjust, and the distance between the grating reading head and the grating ruler is difficult to adapt to changes in external factors, and to provide a method that can overcome the rotating body parts during the movement process. Adaptive servo device for the grating reading head that keeps the relative distance between the grating reading head and the grating ruler constant due to the lack of axis deviation or shape change of the guide rail

[0006] The technical problem solved by the present invention is to design an adaptive servo device for an open grating reading head, which solves the problem that the installation structure of the existing grating reading head is difficult to adjust, and the grating reading head is difficult to adapt to changes in external factors and automatically adjust and The problem of the defect of the distance between the grating scales; through the spring force, the roller always fits the rolling base surface of the roller, which reduces the requirements for dimensional tolerance and shape tolerance between the installation base of the grating reading head and the installation base of the grating scale ;The interference fit between the guide post and the guide sleeve makes the reading head work smoothly; the lateral movement of the anti-rotation sliding shaft and the circumferential movement of the guide bar support seat all ensure that the grating reading head changes with the external conditions. Always stay in the best working position

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