2. Digital bodies¶

For this week we have to create a 3D mannequin, parts of it or a piece of art. The available material is a maximum of 6 cardboard sheets of 800x600 mm and 3 mm of thickness.

Research & Ideation¶

In the first view, I like the idea to make a body surface with exosquelette appareance.

Drawing of a human skeleton by Lelia Desaulniers. Spine corset by Alexander McQueen. Spinal metal dress by Roberto Cavalli . Body surface by Saskia Helinska FabTextiles Barcelona 2021-2022 . Lingerie by Maya Hansen

I like the work that Saskia Helinska has made during Fabricademy.

Tools¶

Process and workflow¶

Different steps of model: model in MakeHuman| Rhinoceros | Slicer for Fusion 360 | real objet

Model 3D acquisition - MakeHuman¶

I used the MakeHuman software to personnalize and obtain a human 3D model. I chose a female model with an asymmetrical pose. I save the model as an mhx2 file to come back to it later and as an STL file to work on it in the Rhinoceros software.

Selection of the object of interest - Rhinoceros¶

I choose to keep only the bust of my model, so I use the software Rhinoceros to cut the head, arms and legs.

describe what you see in this image — Body cut with MeshTrim command in Rhinoceros

Steps to cut my model with Rhino7:

Open the created makehuman STL file on Rhinoceros.
Measure the size of the model with the scale command I want a human size model so I modify the scale of my model.
Change the model scale with the scale command and a factor of 100.
Turn the model vertical with the Gumball tool
Draw a rectangle on the size of the available material with the polyline command (to ensure that the size of the object of interest does not exceed the size of the available material)
Draw a line parallel to the section to be sliced
Use the MeshTrim command to cut an mesh object
Use the cap command
Save as a Rhino 3D model and export as an STL file.

Final 3d modelled body:

Final 3d modelled body by Sypso6 on Sketchfab

Selection of the technique construction - Slicer for Fusion 360¶

Import STL file in Slicer for Fusion 360. This software generates automatically 2D vector cut patterns and animated assembled instructions. I chose interlocked slice technique in vertical direction because I think it gives the best result with an asymmetric model. I moved some individuel slices so that all parts are connected to each other.

View in the Slicer for Fusion 360 software software

Save the file with "save to my computer" to be able to come back in the slicer for the assembly.

To export the 2D plans: Get plans > File type > Selectionner DXF and mm > Export to my computer

Modification of the 2D - Rhinoceros¶

Import file in Rhino and check the ignore thickness box.

I changed the side of the notches for the right leg and the right arm in order to make the assembly possible. I also slightly modified the shape of some slices for aesthetic reasons.

I used 6 cardboard sheets of 800x600 mm and 3 mm of thickness. I rotated each board to landscape and tried to waste as little space as possible by rotating each piece and moving them around.

Laser cut sheets.

Laser cutting¶

Safety

Some materials are unsuitable for laser engraving or laser cutting due to their special chemical composition like Leather or leatherette with chromium, PVC and PTFE). When processing these materials, hazardous dust or gases may be produced. full list of unsuitable materials

I use a 3 mm thick, 600 mm wide and 800mm long cardboard.

The area of interest of the Trotec cutting machine is 630 x 1030 mm.

The laser engraving file uses color differentiation between laser engraving and laser cutting.

Cutting setting - Power = 95 - Speed 3.50

Marking setting - Power = 70 - Speed = 25

Structure assembly¶

The Slicer for Fusion 360 software provides a mounting sequence. Just follow the order to assemble the manequin.

Overcome¶

Fabrication files¶

File: 3d modelling. ↩
File: Laser cut sheets. ↩

Last update: 2023-05-02