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@ -1,24 +1,33 @@
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# nakamochi 3D designs
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at the moment, there's only an FFF (Fused Filament Fabrication) design suitable
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for 3D printing at home in the [fff](fff/) directory.
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the repo contains 3D models of parts used in the nakamochi project.
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all design sources are made in [freecad](https://freecad.org/) no older than v0.20.
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a stock installation of freecad should be sufficient but you might want to install
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those design sources which are made with [freecad](https://freecad.org/)
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use a version no older than v0.20. a stock installation of freecad should
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be sufficient but you might want to install
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[fasteners workbench](https://wiki.freecadweb.org/Fasteners_Workbench) if working on
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a design assembly.
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## fff
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## DIY version (FFF)
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the main file is in [fff/provcase.FCStd](fff/provcase.FCStd). "provcase" stands for
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"provisional case" because it is still unclear whether this will be a final design.
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fused filament fabrication design is suitable for 3D printing at home, located
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in the [fff](fff/) directory. the main file is in [fff/provcase.FCStd](fff/provcase.FCStd).
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"provcase" stands for "provisional case" because it was unclear at the time whether
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this would have been the final version.
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the project contains all the parts to make a full assembly with the following BOM:
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- [raspberry pi 4 model b](https://www.raspberrypi.com/products/raspberry-pi-4-model-b/)
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- [waveshare 4.3inch DSI LCD](https://www.waveshare.com/wiki/4.3inch_DSI_LCD)
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- [raspberry pi 4 model b][rpi4]
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- [waveshare 4.3inch DSI LCD][lcd]
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- [sandisk portable 1TB SSD sdssde30-1t00][ssd]
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- [joi-it armor "block" heatsink](https://joy-it.net/en/products/RB-AlucaseP4+07)
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- [sandisk portable 1TB SSD sdssde30-1t00](https://www.westerndigital.com/en-in/products/portable-drives/sandisk-usb-3-2-ssd)
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- 90 degree angle [USB-C adapter][usbc90deg] 3.1 gen 2, 10Gbps
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- adhesive gasket/seal tape for LCD, 1mm thick, 10mm width, L370mm
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- 4 screws M2.5 L16-18mm for heatsink mount
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- 4 spacers 2-4mm thick depending on the heatsink mount screws length
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- 4 adhesive bottom pads
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- [enclosure main box](fff/box.stl), 3D-printed
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- [enclosure side cup](fff/sidecup.stl), 3D-printed
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all object constraints reference an embedded spreadsheet `params` to avoid
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[topological naming problem](https://wiki.freecadweb.org/Topological_naming_problem).
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@ -31,7 +40,9 @@ visualize how and whether all of them fit well together. it links to the provcas
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so you'll need both files. this assembly group calculates all placement offsets from
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`asmsheet` spreadsheet. here's how the assembly looks like:
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---|---
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the "assembly" std part has a custom property "view" with two options: exploded and
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assembled. the property is configured from the same asmsheet.
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