This article presents a method of the error reducing control in SLS machine. When using SLS machine, there are many factors that cause the errors such as: temperature, trajectory, velocity and laser intensity. Therefore, we need to have a precise method control in order to have an accurate processing sample. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 17, SOÁ K2- 2014 Control method for reducing errors prosessing of the SLS machine • Phan Huynh Lam • Nguyen Thanh Nam • Ho Pham Huy Anh DCSELAB, University of Technology, VNU-HCM (Manuscript Received on December 11th, 2013; Manuscript Revised August 26th, 2014) ABSTRACT: This article presents a method of the error reducing control in SLS machine. When using SLS machine, there are many factors that cause the errors such as: temperature, trajectory, velocity and laser intensity. Therefore, we need to have a precise method control in order to have an accurate processing sample. This one presents the Fuzzy Control Method to help we achieve highly accurate results when process with SLS machine. We propose control method that establishs the criteria based on many influence processing parameters previously mentioned (*) rather than merely control position, velocity, trajectory as the CNC machines. The processing by SLS machine basse on the control MIMO model. Therefore, estimating and parameterizing control parameters to reducing. Keywords: SLS, 3D-printer, STL. X, Y-coordinates of the laser scanning space (mm) <+ / - 300mm 1. OVERVIEW The SLS machine creates 3D details by cutting V- Movement velocity of the Laser (mm / s) each layer. SLS technology has two principles: Vx- X direction moving velocity (mm / s) o The first one: when the laser beam [1] impacts Vy - X direction moving velocity (mm / s) ax – X moving acceleration (mm/s2) on the powder material layer, the details are being built. The impact of the laser on the powder player that increases the temperature of the powder to the ay – Y moving acceleration (mm/s2) f-focal length of Laser melting point, resulting powder is formed above the previous layer and create shapes of the object. P - Power of Laser source (50W max) The second one: details will be created through Ha- Halogen projector lamp signal intensity each layer. Each layer of details includes the .
