This describes the steps for making the automated water tester. The design has slightly changed since the initial post. The original design required printing a central stalk which all the parts attached to. The stalk was 310mm long, which meant that a large format printer was required. In addition, it was difficult to print it without warping. Based on some suggestions, I redesigned the tester to use a piece of 2020 extruded aluminum as the central stalk as well as in a few other parts that were long. The tester parts can now be printed on a printer with a 150mmx150mmx150mm build area.
The autotester is controlled through a web interface.
For convenience, I have broken the assembly into multiple parts:
- Overall guidance on printing the autotester
- Concept of operation
- Putting together the mixer stand
- Putting together the carousel assembly
- Putting together the stopper assembly
- Putting together the plunger assembly
- Putting together the camera mount
- Putting it all together
- Miscellaneous Parts
The Bill of Materials for the AutoTester Can be found here.
The STLs can be found on Thingiverse here.
The PCB design can be found here.
A video showing the previous prototype in operation can be found here.
Good luck and feedback on the design or the build process is welcome