A detection and control method of resin liquid-level of stereolithography apparatus

Yiqing Wang; Wanhua Zhao; Leping Shi; Bingheng Lu

doi:10.1117/12.819841

2 February 2009 A detection and control method of resin liquid-level of stereolithography apparatus

Yiqing Wang, Wanhua Zhao, Leping Shi, Bingheng Lu

Proceedings Volume 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications; 716009 (2009) https://doi.org/10.1117/12.819841
Event: International Conference of Optical Instrument and Technology, 2008, Beijing, China

Abstract

A set of laser detecting system for liquid-level with inclination measurement-based high-resolution and a sinking-block device are developed to detect and control the liquid-level of Stereolithography Apparatus precisely. A brightness-variable laser source is adopted to eliminate the computational error of divider, a closed-loop circuit is set to measure the terminal voltage directly which proportional to the output current of PSD, and hence the position of laser beam can be indicated accurately. A sinking-block device is employed to control the liquid level. The precise calibration result of this detecting device indicates that the resolution of the liquid-level detection can reach ±1.5µm. Compared with overflow liquid-level control, this liquid-level control device of sinking-block style can allow the liquid-level wave reduce from ±45µm to ±15µm. This system works stable with the high precision and antijamming ability. It has applied successfully in Stereolithography Apparatus.

Citation Download Citation

Yiqing Wang, Wanhua Zhao, Leping Shi, and Bingheng Lu "A detection and control method of resin liquid-level of stereolithography apparatus", Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 716009 (2 February 2009); https://doi.org/10.1117/12.819841

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