wildcard week

week_17

assignment

Individual assignment: write an application that interfaces with an input and/or output device that you made group assignment: compare as many tool options as possible

experimentation

make it happen

composites

2016

for the first test with composites I wanted to make a clip stand for iphone/ipad. I was planning to use a carbon fibers that we had in the valldaura labs as a leftovers from the workshop with airbus. see the process and file preparation….time pressured me a bit and I had no opportunity to go up to Valldaura, so I had to skip this experimentation for now… anyway, you can still get the files and try to make it by yourself...

download files_clip stand

...so and I decided to mill a shell for my other project and I decided to test a shell… at the end I didnt get to the milling of the mold,used both vendors - textile and resin-epoxy...to be continued...

The mixture of materials should be done with a ratio of 2/1, with 2 times amount of Epoxy resin. Of course, it is very important to protect your skin, so use gloves, shades, any other kind of protection! After mixing the two products until homogeneous, the process of application should be done very quickly (before the mix heats up and dries) and spread equally on the pieces of textile fabric (3 layers of textile in my case). The next step is the vacuum bagging process, and it is very important to cover the mold and all the other layers with two sheets of intact film (make sure they are not perforated), one on the bottom and the other on top so as to protect the machine from the resin. A satisfying result should appear at approx. twelve hours later.

after designing my piece in Rhino I used RhinoCAM for code generation and up here you can see the processes (Horizontal roughing and finnishing).

milli on Shopbot

Epoxy and hardener.

and since I did this assignment back in 2016 and I lost all the files because I was working on the LAB computer and saved them only on the cloud, what is currently not working, unfortunatelly I saved only pictures from the process and final output.

robotics

2019

...so I decided to test capabilities of 3D printing with robotic arm. IaaC is well known for experimentations and research in that field. Robotics Taco abb gh Gh>//panel code copy to txt file and change the extension from r to prg Prg file export by usb transfer to robotcontroller first test was with the layer height of 2.8 mm than change 4.8

I am aware of the fact that my geometry is more complex, and therefore I had skype call with Manuel from Nagami design to get a feedback about various possibilities of using robotic printing technique of my geometry...

...in such a situations make it spiral continuous line that extruder on the robotic arm can follow the path easily...

using double-with layer instead of single assuring that the layers would get more support...

top of the geometry would need some extra support what I can get by creating contour lines taking as a base my geometry and from last contoure curves make an extrusions - that way I can create supports for the top overhanging part.

...and of course than contour everything before printing...this should be the workflow for robotic 3d printing...next step - move to the reality and prepare my model for printing with clay and ABB robot...

So it started. First we had to download a Taco plugin for grashopper to be able to generate a code for the robot. than I imported my geometry and set it as an input in the gh definition.

Preparation of the material - it needs to be mixed with a bit of water to get nice soft homogenious mass, than it needs to be filled into the extruder, be careful to avoid bubbles....otherwise it would create a small air explosions, bubbles and another not wanted effects.

The material was too dry, not enough of water, thats why it started to have a gaps... than as you can see, there was a bubble, so it created a small explosion...Even after the pressure adjustement (around 4 bar) it still needs to be tweaked manually even during the prints.

Printing a first test, than after finishing we cleaned up the extruder with releasing the pressure.

Second try. Final output went well.

Final output, fresh outta printer.

Final output, when it got dried. Now I can put it to the owen to bake it.

download files_robotic printing

Edu showed us the process of making a long board deck with the proper curves and concaves. First he gave some quick tips on how to design it on Rhino/gh and then we made a model to cut the mold in foam. We used a cnc machining strategy on RhinoCAM and took the file to the ShopBot.

composites - alighned fibers for the composites. we can use different binders, e.g. resin, epoxy (no need to apply so much polyester - polyester by the UV exposure on the sun gets more yellowish), carbon fibre (doesnt work with polyester, always use epoxy! epoxy 10times more expensive than polyester) preimpregnated carbon fiber - the one I wanted to use in valldaura PrePreg Carbon plywood is also a composite, gluing layers with different directions curing *reach 60% of capacity of hardness, and postcuring time, - reaching 100% of hardness… sk8boards: rhino/gh definition milling - foam - always conventional horizontal roughing, paralel finishing

keywords

_module_machine_sensors_actuators_power electronics_open/closed-loop control_static/dynamic paths_PID, acceleration, model predictive control_embedded, virtual control_real-time networks_file formats_toolpath planning_design representation_geometry solver_

useful links

FabAcademy 2019_schedule

FabAcademy 2016 recitaiion_Caleb Harper, Open Agriculture at MIT

Gestalt in architecture_gestalt