**Ishak Ertugrul**

Department of Mechatronics, Mus Alparslan University, 49250 Mus, Turkey; i.ertugrul@alparslan.edu.tr Received: 9 April 2020; Accepted: 9 May 2020; Published: 20 May 2020

**Abstract:** 3D printing has lately received considerable critical attention for the fast fabrication of 3D structures to be utilized in various industrial applications. This study aimed to fabricate a micro beam with digital light processing (DLP) based 3D printing technology. Compound technology and essential coefficients of the 3D printing operation were applied. To observe the success of the DLP method, it was compared with another fabrication method, called projection micro-stereolithography (PµSL). Evaluation experiments showed that the 3D printer could print materials with smaller than 86.7 µm dimension properties. The micro beam that moves in one direction (*y*-axis) was designed using the determined criteria. Though the same design was used for the DLP and PµSL methods, the supporting structures were not manufactured with PµSL. The micro beam was fabricated by removing the supports from the original design in PµSL. Though 3 µm diameter supports could be produced with the DLP, it was not possible to fabricate them with PµSL. Besides, DLP was found to be better than PµSL for the fabrication of complex, non-symmetric support structures. The presented results in this study demonstrate the efficiency of 3D printing technology and the simplicity of manufacturing a micro beam using the DLP method with speed and high sensitivity.

**Keywords:** digital light processing; projection micro-stereolithography; 3D printing; micro beam; fabrication
