Technology of 3D-Printer based on fused deposition material has developed intensively with varying qualities. However, default setting of printing process parameters provided by the manufacturer in some cases does not guarantee quality (dimension error and strength) of the printed part, since there are several process parameters that need to be considered. A 3DPrinter with poly-lactic acid filament material has been applied in this study. A specimen standard has been used as a tensile strength and dimension error test to represent printed part quality. Three printing process parameters: layer thickness, layer speed and infill density have been optimized using Taguchi L9 Orthogonal Array method. In a recent project, we have thus investigated possibilities to increase the printability of especially flexible filament. The presentation will give an overview of the modifications and their effect on the most frequently used elastic filaments, offering suggestions to modify common 3D FDM printers in similar ways for increased printing results with or without integrated fibres or filaments.
The design and fabrication of lever operated wheelchair is can be renovated. There are many numbers of people who are suffering from disabilities caused by an accidental injury. Various methods are used for developing manual wheelchair in order to help those people. HMI, HCL and Accelerometer in the wheelchair are some of them used by researchers. These techniques modify the existing design but there are many individuals who cannot manage to pay for advanced model. So, in this deign we are replacing the chain drive mechanism by slider crank mechanism for conveying the force to give motion to wheelchair. The wheelchair is designed in such a way that it requires a less effort by an operator to operate and it is economically affordable as compared to other advanced wheelchair.An operator safety can be accomplished by analysing a model in a software like Ansys, Hyper mesh, etc. by applying load and boundary conditions.
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