Two-axis photoelectric collimator based rotary table division error detection method

Abstract

The invention discloses a two-axis photoelectric collimator based rotary table division error detection method. The two-axis photoelectric collimator based rotary table division error detection method includes the steps: (1) mounting a multi-tooth division table at the center of the working face of an inspected rotary table, fixing a planar mirror onto the multi-tooth division table and using an autocollimator for collimating the planar mirror; (2) enabling the inspected rotary table to rotate for a circle so that both two axes of the photoelectric autocollimator have numerical reading; (3) placing the inspected rotary table at the zero position, reading initial values of the two-axis photoelectric autocollimator, then rotating the multi-tooth division table by an angle phi, and enabling the planar mirror to rotate by the angle phi along with the inspected rotary table; (4) enabling the planar mirror to rotate by the angle phi towards the opposite direction along with the multi-tooth division table, enabling the photoelectric autocollimator to collimate the planar mirror again and read measurement values until a circle is completed; and (5) changing an inclination angle of the multi-tooth division table relative to the rotary table while keeping the two-axis photoelectric autocollimator immovable, repeating the step 2, the step 3 and the step 4 for secondary detection, and reading measurement values of the two-axis photoelectric autocollimator. By the aid of the method, the requirement on adjustment is lowered.

Description

technical field [0001] The invention relates to a method for detecting the indexing error of a turntable, in particular to a method for detecting the indexing error of a turntable based on a photoelectric two-axis collimator. Background technique [0002] The turntable is a common equipment for circular indexing. It is often used as an accessory of a machine tool to process parts for circular indexing. In a three-coordinate measuring machine, a turntable is also commonly used to measure rotating parts. With the continuous development of science and technology, the requirements for the precision of the turntable are getting higher and higher. The accuracy of the turntable can be effectively improved through the method of error compensation, and higher accuracy requirements can be achieved at a lower cost. [0003] In order to compensate the indexing error of the turntable, it needs to be verified first. figure 1 Shown is the use of comparison method to test the indexing err...

AI Technical Summary

Problems solved by technology

If the adjustment does not meet the requirements, the measured graduation error contains adjustment errors, which will have a great impact on the measurement results

[0005] ① The photoelectric autocollimator is not leveled

However, when adjusting, the adjustment amount is not easy to control, the operation is not convenient, and repeated adjustments are required

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