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--- fabricademy2017:students:alexandra.roldan:week_6 [2018/02/14 01:08]
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+++ fabricademy2017:students:alexandra.roldan:week_6 [2018/02/14 04:18]
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+For this week assignment I’m making a head piece that attaches on the ear.
+I´m ussing RHINO+ GRASSHOPPER
+The first thing I did was download a head as an STL and loaded it into rhino WIP. I did this so that i could draw on top of the head, and make the head piece as accurate as possible. Once the head was loaded, I drew a polyline around the ear, using the constraint: “On mesh”. I did that so that the polyline was directly on top of the skin. I procceeded to load the line onto grasshopper. To do that, follow the next steps:
+The first thing I did was download a head as an STL and loaded it into rhino WIP. I did this so that i could draw on top of the head, and make the head piece as accurate as possible. Once the head was loaded, I drew a polyline around the ear, using the constraint: “On mesh”. I did that so that the polyline was directly on top of the skin. I procceeded to load the line onto grasshopper. To do that, follow the next steps:
+  -
+Go to grasshopper
+  -
+Insert a curve
+  -
+Load the polyline
+Next, i offset the curve, giving it a witdth of 3 mm. When I first attempted to loft the lines, i couldn’t becasue they were on different branches of the tree. I had to flatten the offset curve, and then loft them. I obtained a Surface which i then offsetted 3 mm and closing, getting a closed polysurface. I wanted to use some control points from the generated polysurface so I baked i tonto rhino. There, i used the command “Extract Wireframe”, and obtained the isocurves I needed.
+I chose to use 6 sections of the polysurface for creating the featherlike components of the headpiece. First, i created a Surface inbetween 4 control points of the extracted wireframe. I then created 2 polylines, using “on mesh” so that the line would stay on top of the head. I modified the lines a Little bit, making the design much more organic. I loaded the lines and surfaces onto grasshopper and used the command “Sweep2” for generating the polysurfaces.
+I repeated the same steps for the next 5 feathers.
+After generating all of the surfacesm i used “SolidUnion” in grasshopper as a tool for combining all of the bodies. I baked the design onto grasshopper, but for whatever reason, every body seemed to be separated. I used the command boolean union to combine the bodies, and finally, my design was ready for printing.
+I used a makerbot replicator + 3D printer, with the following parameters:
+  -
+Extruder temp: 219ºC
+  -
+Layer height: 0.2 mm
+  -
+Infill: 10%
+  -
+Rafts: yes
+  -
+Supports: yes
+  -
+Material: PLA
+After about an hour and a half the piece was ready.
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+I continued the project on nest´s week assignment, see [[:fabricademy2017:students:alexandra.roldan:week 7|here]]
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