Research of built-in-type high precision angle encoder: emulation and experiment

Valery P. Kiryanov; Alexey V. Kiryanov; Ilya F. Klistorin

doi:10.1117/12.817993

18 November 2008 Research of built-in-type high precision angle encoder: emulation and experiment

Valery P. Kiryanov, Alexey V. Kiryanov, Ilya F. Klistorin

Proceedings Volume 7138, Photonics, Devices, and Systems IV; 71380T (2008) https://doi.org/10.1117/12.817993
Event: Photonics, Devices, and Systems IV, 2008, Prague, Czech Republic

Abstract

The accuracy of built-in-type encoder with an external diameter of 180 mm that is offered by the world leaders doesn't exceed ±2.5 angular seconds. A high accuracy angular built-in-type encoder with error about ±0.3 angular seconds for laser images generators is shown in this paper. An angle encoder was made using 165 mm raster that had error equal to ±1.1 angular seconds. The error spectrum had evident predominance of second harmonic. This peculiarity predetermined choice of encoder configuration with four reading heads. The encoder emulation result had predicted encoder error no more then ±0.25 angular seconds. Resulting error of virtual encoder was determined by summary contribution of 4, 8, 12 and 16 harmonics. An encoder resulting error was determined by special angle measuring test bench. Error of real encoder didn't exceed ±0.35 angular seconds. The error spectrum had both expected 4, 8, 12, 16 harmonics and unexpected 2, 3, 5, 7 ones. The difference between the results of emulation and experiment is analyzed in this paper. The problems of creation of angle measuring test bench with error no more than ±0.1 angular seconds using ROD-800 angle encoder (which has accuracy only ±1.0 angular seconds) have been discussed.

Citation Download Citation

Valery P. Kiryanov, Alexey V. Kiryanov, and Ilya F. Klistorin "Research of built-in-type high precision angle encoder: emulation and experiment", Proc. SPIE 7138, Photonics, Devices, and Systems IV, 71380T (18 November 2008); https://doi.org/10.1117/12.817993

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KEYWORDS

Computer programming

Raster graphics

Head

Error analysis

Distortion

Spindles

Instrumentation engineering

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