Grasshopper
Purple: Creates a series of circles, following a series of points along a single plane Red: Taking a range of values determined by a number slider, the arc changes the angle of rotation and therefore the displacement of each line
Blue: Shift list and graft lines are used to correctly assemble the data structure. It cannot graft output before it goes through the end points or else the shift list will not work. Orange: The amplitude command moves each midpoint. To create a series of points that guide the twisted form. The sine function graph mapper determines the changing shape of the section.
Final form created on grasshopper that I would then study 7 slices to understand how I could fabricate the pieces together.
Manufacture
This would provide me 35 pieces as each slice is 5 printed cuts through the laser cutter. Each section is labelled correctly to help the fabrication of the model.
Yellow: Creates the planes for which extrustions/subtractions for the fixings element that will taken from.
Pink: Forming the extrusion itself using the solid union command to create the slots that fix the pieces together. These are then baked and sectioned in Rhino to create a dwg file.
Fabrication
Developmental sketch showing how each piece is divided into slices that are then stacked on top of each other to create one whole geometry. The final design now uses two layers for the e xtruded/subtr act ed layers for more friction. Laser cut file: Red lines represent cut & Green for etch
The final 7 pieces
Green: Offset curves at each slice to create 2D shapes. The extrude command creates the 3D form. I discovered the offset was incorrect and had to use the negative command to flip it.