Open Source Laboratory Rocker / Mixer / Shaker (Lab Rocker)

Here is my take on the laboratory rocker, which is a laboratory tool/device used in laboratories for mild to moderately aggressive biological and molecular mixing applications.

→ This variable speed, 2-dimensional rocker was completely designed in Autodesk Fusion360.
→ The design utilizes a changeable apparatus rack/tray/platform for holding apparatus to perform a see-saw motion for mixing content.
→ The rack/tray can be secure in place using the side locks on either side.

→ I have uploaded two types of racks/trays for this Thing: -

• Single Piece Test Tube Rack
• Single Piece Beaker Tray

→ The surface area dimension of the beaker tray are 205 x 105 millimeters.

→ The prototype model employs an <a href='https://www.amazon.com/Arduino-Uno-R3-Microcontroller-A000066/dp/B008GRTSV6/ref=sr_1_3?ie=UTF8&qid=1528253978&sr=8-3&keywords=arduino+uno'>Arduino UNO</a>, a <a href='https://www.amazon.com/gp/product/B00PNEQI7W/ref=oh_aui_search_detailpage?ie=UTF8&psc=1'>NEMA 17 stepper motor</a>, <a href='https://www.amazon.com/gp/product/B00RCTW5SM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1/'>EasyDriver v4.4</a>, an external <a href='https://www.amazon.com/gp/product/B019Q3U72M/ref=oh_aui_search_detailpage?ie=UTF8&psc=1'>12V DC power supply</a>, readily available <a href='https://www.amazon.com/gp/product/B072JZ1M5N/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1/'>skateboard bearings</a> and some basic electronics equipment like connector wires, <a…