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modifications
Modifications
→Anglais / English
I took part in the initiation to the laser cutter offered by PING (super interesting, I recommend you if you have never approached this technology). During a discussion on the applications of this technology to my project with Adrien (thank you for the initiation and the advice by the way), he gave me a super interesting advice, it'snt possible to burn or to cut a part more which height is more than 8mm with the machines of the fablab (breil's workshop or platform C), so there wouldn't be engraving of the depth of the hangboard's grips on a block of wood taken out of the milling machine as mentioned before, but it is possible to glue pieces of wood together with wood glue or epoxy, with this technique the piece is no longer limited in height or almost. One solution to making a one-piece hangboard (different from the one I talked about in Update 2) would be to divide a hangboard design into 5 to 8mm sheets and glue them together afterwards. This solution brings new possibilities and freedom but also new constraints of shapes so I have to study it more before trying it, to be continued.
===Update 4: epoxy + laser cutting into layers ===
(written on the 08/03/2021 and translated on the 08/03/2021)
For the laser cutting of the hangboard and the assembly I could take inspiration from this project:
Other projects using the assembly of laser cut parts:
http://carrefour-numerique.cite-sciences.fr/fablab/wiki/doku.php?id=projets:maquette_topographique_3d (very interesting for the technique of division into layers using software, 123D Make, an autodesk software (the same people who made fusion 360) https://autodesk-123d-make.fr.softonic.com/)
I also started to learn about epoxy:
Polyepoxides (epoxy) act as a tight barrier. Once dry, it becomes rigid and retains its shape, which makes it possible to use it to reinforce the containers which are coated with it. In addition, when the reaction mixture polymerizes, it reacts chemically with many organic or inorganic materials. This reaction makes it a glue with a good tensile factor in the presence of many materials (wood, glass, porcelain, metal, etc.).
Epoxy glue is made up of two toxic elements: the resin and the hardener. When the mixture is perfectly dosed, polymerization makes the cured material relatively stable and neutral. Risks associated with handling epoxy without protection according to Wikipedia:
• Skin irritation, caused by resins, but more so by hardeners.
• Contact eczema, by the most sensitizing resins (rather than hardeners), with possible damage to the face (including eyelids, etc.). Occupational dermatoses are observed in exposed workers.
• Cross allergies? The Patch test is often negative for non-DGEBA epoxy resins.
• These resins do not seem to induce asthma or cancer. However, a single case of contact eczema evolving into a cancerous lesion is observed.
You must therefore wear adequate protection when handling epoxy (gloves, well-sealed dust mask and safety glasses) and work in a ventilated environment.
French websites:
(mine of information on the best assembly techniques to include in the design)
(risk site)
English websites: