The current build instructions, including both hardware and electronics assembly, can be found here: https://docs.google.com/document/d/12_rMrmG7NDBnR3S7hENq-rUHp8FnTqRoOEeFMkXnlS4/edit?usp=sharing
The entire Solidworks Assembly, with associated part files, can be found in this Google Drive: https://drive.google.com/drive/folders/1YrJEOmOMZtXcHABYO0hEu0etJ7LAC9Lf?usp=sharing
The current assembly is named “TLA_VENTILATOR_ASSY_V2.SLDASM”.
3D Printed Parts¶
Individual 3D printed parts may be downloaded here:
Optional RPi DIN rail mount alternative, if your printer cannot handle the feature resolution on the original DIN rail mount:
Download all parts:
Printing tips: Be sure to maintain high infill for airway components: ideally, use 4 wall-layers (vertical layers), minimum 40% infill, and 4 layers on both the top and bottom. Parts should be leak-tested prior to installation, for instance, with a stopper and water bath. Most of our test prints were performed using PLA, and without any supports or rafts, since these are challenging to remove later. Supports should not be necessary provided the parts are oriented mindfully on the build plate. Also, try to keep cylindrical components oriented vertically (so that the circle is traced on the build plate); this will improve circularity of the chamber.
For PRUSA users, we provide an example project, demonstrating part orientation:
The side, top, and bottom panels are made out of 1/16” HPDE sheeting. Laser cut, or cut by hand, two of the “SIDE_IP_PANEL”, and one of each of the rest! We use a perforated HPDE for the bottom panel only; the rest are solid HPDE.
Download all .DXF files: