The motivation of OpenFixture was to make a parametric fixturing system that could take fully generated inputs from kicad and produce a test fixture with minimal effort. The easiest way to use it is through the kicad python scripting interface.
For most projects (if using the standard BOM) the only parameters you'll need to set are mat_th and pcb_th. Something like the following should be sufficient:
./GenFixture.py --board [path to board.kicad_pcb] --mat_th [thickness in mm] --pcb_th [thickness in mm] --out board-fixture usage: GenFixture.py [-h] --board BOARD --mat_th MAT_TH --out OUT [--pcb_th PCB_TH] [--screw_len SCREW_LEN] [--screw_d SCREW_D] [--layer LAYER] [--flayer FLAYER] [--ilayer ILAYER] optional arguments: -h, --help show this help message and exit --board BOARD <board_name.kicad_pcb> --mat_th MAT_TH material thickness (mm) --out OUT output directory --pcb_th PCB_TH pcb thickness (mm) --screw_len SCREW_LEN Assembly screw thread length (default = 14mm) --screw_d SCREW_D Assembly screw diameter (default=M3) --layer LAYER F.Cu | B.Cu --flayer FLAYER Eco1.User | Eco2.User --ilayer ILAYER Eco1.User | Eco2.User
The resulting output is:
- A 3D model of the test fixture for visualization
- A 2D DXF that can be directly lasercut for assembly
Recommended workflow for kicad
- Clone this repo if you haven't already
- Setup a project specific bash script (use genfixture.sh as an example)
- Enter board specific info, fixture hardware, material thickness, etc.
- Whenever the layout changes call ./genfixture.sh (from repo) and pass path to .kicad_pcb file.
- Fixture will be generated in $OUTPUT folder.
- If anyone is interested in integrating this into kicad directly I'd be happy to support it and clean it up...
- All that is needed is M3 (14mm+) screws, M3 hex nuts, and lasercut parts
- I use nylon bushings in the main pivot with m3 screws for a smoother joint but this is optional
More info including detailed assembly instructions at http://tinylabs.io/openfixture-assembly
- Newer version of openscad >= 2015.03-1
- kicad or other EDA software. Please email me if you have instructions for other packages so I can add them.
- When loading the fonts file a new small window opens in Ubuntu. Seems innocuous but still annoying [Only seen on ubuntu 14.04]
Creative Commons (CC BY-SA 4.0)
- Elliot Buller - Tiny Labs Inc
Please email with any pull requests or new feature requests firstname.lastname@example.org