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An XY-Carriage which moves the deposition tool along paths within the XY- plane to build the layers of the part A Z-Carriage which positions the build surface vertically relative to the deposition tool The carriage‟s mentioned above are assembled individually and these are put together to form the chassis for the fab at home model 1 machine. The chassis of Fab at home is shown in fig 3.2 below. Fig 3.2 Fab at home chassis after assembly The Z carriage is mounted on the bottom of the assembly and the XY carriage mounted on top of the base assembly. Threaded bass inserts are available on the base which facilitates the mounting of the carriages. Also fastened to the base are the stepper motors, which are placed at the end of lead screws and connected to the XY and Z carriages. 66
3.2.3 Assembling Electronics and cabling The model 1 fab at home machine consists of the following electronic parts and components: Elpac MW4024-760-NC-WH 24VDC Power Supply AC Power Cord for Power Supply Olimex LPC-H2148 Microcontroller Board Xylotex XS-3525/8S-4 4-Axis Stepper Motor Amplifier Board Winford Engineering DB-25 Breakout Board Omron D3M-01K3 SPST-NC Limit Switches Limit Switch Cables Ribbon Cables to connect the LPC-H2148 to the other devices USB Cable to connect LPC-H2148 to the user's personal computer Xylotex XS-3525/8S-4 4-Axis Stepper Motor Amplifier Board The stepper motors of the deposition head and positioning system of the fab at home machine are given control signals and power with the help of this Xylotex stepper motor amplifier board. It is designed with a set of screw terminals to allow simple connection of devices to any auxillary input/output signals coming onto the board via ID26 connector. These terminals are used to connect with limit switches, which will then travel to the olimex microcontroller board via the IDC26 to DB25 cable, through winford board and then over the ID26 cables to the microcontroller. This stepper board is a 4 axis pulse width modulated current controlled bipolar micro stepping controller with each axis driver having a +- 2.5A/phase at 35volt maximum continuous output rating. Each axis accepts direction and step signals and alongside is two jumper inputs to define micro steps per full step. 67
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 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: Fig 3.1 The deposition head At the
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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