Build a low-cost, open-source tensile or compression tester

[sgbaird]

Examples:

1. https://www.instructables.com/Universal-Tensile-Testing-Machine-VERSION-TWO/
2. https://www.creativemachineslab.com/freeloader.html
3. https://tspace.library.utoronto.ca/bitstream/1807/109212/4/Liu_Xinyue_202111_MAS_thesis.pdf
4. https://www.printables.com/model/81214-open-pull-diy-universal-test-machine

Deciding which one to make, getting the components, assembling, testing, and making it WiFi enabled

[sgbaird]

In addition to or as an alternative to a load cell, perhaps using a linear actuator with position feedback and measuring the power consumed by the actuator. The setup could be relatively simple with two plates on a linear track (one sliding, one fixed), similar to designs above.

#148

[sgbaird]

I ordered a variety of linear actuators from actuonix and peripheral components from polulu

Related to:

• Maximizing compressive strength of a 3D printed resin lattice #151

In particular, the track actuators should be more straightforward to integrate. The 256:1 gearing actuators will require care to prevent safety hazards, due to a max load of 300 N and a back drive load of 500 N (~150+ N = pinch hazard).

[sgbaird]

Blue Polulu box in the office with the printer, step down regulators to provide 5V to microcontroller from 12V power supply and I think shunt resistors too. Actuators should be arriving soon.