Time fence type numerical control indexing table used for precise measurement

Abstract

The invention relates to a time fence numerical control indexing turntable used for precision measurement, which comprises a numerical control system based on a single chip microcomputer, a stepping motor, a precision mechanical turntable, and a time fence angle movement sensor. In a precision measurement process, and when the indexing turntable needs to be precisely located and turned to a certain specific angle according to certain steering, an instruction including steering and turning angle information is input through the keyboard of the numerical control system, leading the mechanical turntable to turn according to the steering and the turning angle in the instruction. The time fence angle movement sensor detects the information of the angle turned by the mechanical turntable and feeds back to the numerical control system, thus forming closed loop control, and guaranteeing the turntable to be located to the angle indicated in the instruction, wherein, location precision mainly depends on the precision of the time fence angle movement sensor. As a novel time fence angle movement sensor and the numerical control system based on the stepping motor are adopted, cost on the precise numerical control indexing turntable used for measurement is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of precision machining and detection, and in particular relates to a time grid type numerical control indexing turntable for precision measurement. Background technique [0002] In the field of precision metrology, a large number of precision measurements involving angles often have to achieve arc-second level or even higher accuracy, and it is necessary to quickly and accurately achieve angular positioning. The traditional positioning method is realized by using a precision digital display indexing turntable. The metering personnel rotates the handwheel of the digital display indexing turntable while observing the angle displayed on the digital display table of the indexing turntable, and artificially performs precise positioning of the angle. Metrology personnel control the handwheel to rotate the turntable by hand, so it is difficult to accurately perform angular positioning at the angular second level an...

AI Technical Summary

Problems solved by technology

Metering personnel control the handwheel to turn the turntable by hand. It is difficult to accurately perform angular positioning at the angular second level and higher precision. It requires a good feel and repeated adjustments. The work intensity is high and the work efficiency is not high.

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