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The flat layer support can be either printed by either slicing the bottom surface of the part or using STL files exported straight out of the modelling software. In this project both these methods are tried for statistical purposes. The later method of printing is fairly a straight forward approach in which the part is first modelled in solidworks as per the desired dimensions. This is then saved as a STL file – which is a feature included within all modelling software‟s. The STL file can be then imported into the user interface software of Fab@home machine. Once imported into the software, it is oriented in the right direction, machine is set for origin and home positions and it is set for printing. 2.5 Printing the Main part Once the support structure is ready, the next step would be to print the main part on top. After the modelling, G & M codes of the model are to be developed using a computer aided manufacturing software. The milling operation with a flat cutter is chosen for this purpose as it‟s the closet choice available for our process of deposition. The diameter of the nozzle head is used as a reference diameter of the cutter. The program is run which generates the tool path data for the whole part. This is then recorded by the software and the output can be then exported as in Fig 2.15 below: Fig 2.15 Cutter Path Data 60
As this text file is to be used with the Fab@<strong>Home</strong> machine, a lot of information in the file may not read by the machine and hence is not required. These are mainly the tool path, contour and speed data etc. This file may be edited by using “Notepad” or any similar word editor available in the Computer‟s operating System. This file containing the raw coordinates of the part is now ready to be processed with the modified four vector cross product algorithm which was explained above. This is done with MATLAB – mathematical analysis software. Once the modified four vector cross product algorithm is run, the tool paths are tested and consecutive curved layers are found. The coordinates of all the surface points on the curved layers are obtained and the output is saved in .txt format which can be then used as input to the Fab@<strong>Home</strong> machine. 61
Page 1 and 2:
An Investigation into curved layer
Page 3 and 4:
Contents Abstract..................
Page 5 and 6:
3.5.2 Fabepoxy.....................
Page 7 and 8:
methodology to print simple curved
Page 9 and 10: List of Figures 1.1 The Rapid proto
Page 11 and 12: 4.3 Parts being tested with Hounsfi
Page 13 and 14: List of Abbreviations 3D: Three dim
Page 15 and 16: Fig 1.1 The Rapid prototyping Cycle
Page 17 and 18: 1.1.1 Stereolithography Stereolitho
Page 19 and 20: The object to be made is first mode
Page 21 and 22: 1.1.5 Laser Engineered Net Shaping
Page 23 and 24: 1.2 Fused Deposition Modeling A det
Page 25 and 26: Fig 1.8 Deposition Head Different t
Page 27 and 28: 900mc is capable of producing parts
Page 29 and 30: noted that the parts built in this
Page 31 and 32: structure. Honeycomb scaffold archi
Page 33 and 34: optimal direction to build a part t
Page 35 and 36: processing treatment was analyzed w
Page 37 and 38: The actual influence of the curved
Page 39 and 40: Separating the Main part with its s
Page 41 and 42: limited to simple models. It could
Page 43 and 44: Fig 2.2 Faces, Edges and Vertices o
Page 45 and 46: 2.1.5 Constructive Solid Geometry C
Page 47 and 48: A STL file is a triangular represen
Page 49 and 50: Fig 2.8 A sample Binary STL File Sl
Page 51 and 52: Different processes may either vary
Page 53 and 54: At the very outset of generating th
Page 55 and 56: and correction of each point to sat
Page 57 and 58: apid prototyping machine are remove
Page 59: Fig 2.13 Main Part Fig 2.14 Support
Page 63 and 64: mounted to the axes carriage. Timin
Page 65 and 66: Fig 3.1 The deposition head At the
Page 67 and 68: 3.2.3 Assembling Electronics and ca
Page 69 and 70: microcontroller is now disconnected
Page 71 and 72: The relationship between test point
Page 73 and 74: on the mechanical properties and po
Page 75 and 76: 3.5.1 Silicone with other materials
Page 77 and 78: Fab@home machine. Since our require
Page 79 and 80: are printed using the two suitable
Page 81 and 82: The support structure‟s dimension
Page 83 and 84: machine Fig 3.13 Flat and curved la
Page 85 and 86: 4.1 Experimental conditions Chapter
Page 87 and 88: have many factors from contention a
Page 89 and 90: 4.3 Taguchi methods There are two t
Page 91 and 92: Such steps usually identify the nee
Page 93 and 94: Nominal is best Larger is better S
Page 95 and 96: Control of material flow - The lead
Page 97 and 98: Fig 4.3 Parts being tested with Hou
Page 99 and 100: values in all cases are almost doub
Page 101 and 102: level. The other parameters were in
Page 103 and 104: The finite element method has had a
Page 105 and 106: performance of finished FDM parts [
Page 107 and 108: ehaviour with failure occurring at
Page 109 and 110: Fig. 2 (a) is the thin curved part
Page 111 and 112:
Table 5.1 Property data: Fabepoxy M
Page 113 and 114:
optimum number. The final finite el
Page 115 and 116:
Fig. 5.11 Load and boundary conditi
Page 117 and 118:
overall deflection pattern of two s
Page 119 and 120:
Fig. 5.13 Variation of compressive
Page 121 and 122:
Fig. 5.15 shows the overall deforma
Page 123 and 124:
The effectiveness of the deposition
Page 125 and 126:
[11] M. Greul, T. Pintat, M. Greuli
Page 127 and 128:
[32] Philip J. Ross, 1988, “Taguc
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