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Fig 3.3 Electronics – Assembled view 3.3 Fab @ home Installation and commissioning After all the parts of the chassis and electronics are fully put together, some final minor assemblies of the last stage are still left to be completed, some of which are – levelling the z table, adjusting the motor current, mounting the belt, truing the XY Carriage etc. To ensure that the two sides of the X axis are driven at the same speed, the belt is mounted. This is done so that perpendicularity between the X and Y axis is maintained at all times. Also, to ensure that X and Y rails are perpendicular to each other, X rails are parallel to each other, Y rails are parallel to each other, truing of the XY carriage needs to be done. To prevent the motors to be overheated the current passing through the motors needs to be regulated and hence the motor current needs to be adjusted. To allow the table to be in level with respect to the XY carriage, levelling of Z table is necessary. For the deposition tool to maintain a constant distance from the table during the deposition of material, it is imperative to have the XY plane parallel to the Z table. 70
The relationship between test points and potentiometers are derived from xylotex‟s website. The value of Motor current may be defined as equal to .69 times the value of voltage available. 3.3.1 Fab at <strong>Home</strong> Machine Driver and PC Software Installation For the computer to accept the Fab at home machine as a new hardware and to run it, specific drivers and software‟s are required. The Fab at home wiki website is a good source were all necessary software and drivers are available and can be downloaded. A universal serial bus cable may be used to connect the computer with the fab at home machine. Once the machine is turned on, the computer detects that a new hardware was plugged in and requests for the location of the drivers, which is then given. Once all the required drivers are installed, the machine is set to be controlled upon by the user. Fig 3.4 Fab at <strong>Home</strong> software – User Interface control The fab at home graphic user interface shown above (Fig 3.4) is created using open gl graphics rendering which is initially written in c++ in Microsoft visual studio. Having been made in a windows environment, right now the software runs only in the recent Microsoft operating system family. This interface helps to paint the true physical motion of the fab at home machine at any time along with the synchronised motion of the graphics. The software communicates with the fab at home machine through a universal serial bus cable connected between the PC and the machine. The fab at home software has a provision for accepting .stl and .txt files which are the two main formats used to import cad models desired to be printed. Within the software, there 71
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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 and 60: Fig 2.13 Main Part Fig 2.14 Support
Page 61 and 62: As this text file is to be used wit
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: microcontroller is now disconnected
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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