HW12 - ndm736/ME433_2023 GitHub Wiki

My favorite mechanical prototyping method is making parts from laser cut acrylic. For more complicated geometries, use 3d printed parts.

I like to CAD in OnShape, which is free but everything made is public (like github). Feel free to use SolidWorks, NX, or whatever CAD you know.

For homework, design a small box from laser cut parts, assembled with tabs and t-slot 4-40 screws and nuts. Also design a wheel to be made on a 3d printer, to mate to the blue TT drive motor and using an o-ring as a tire. Submit a screenshot of the designs on Canvas. It is not necessary to actually laser cut or 3d print these parts, you'll do that later for the final assignment.

Here is the list of materials available:
Acrylic, 12"x24"x1/8" (really 11.75"x23.75"x0.117")
Blue TT drive motor
4AA battery holder
M2 threaded insert, heatset
M2 5mm, for heatset insert
M3 8mm, to hold wheel on motor
2-56 1", to hold motor to robot
2-56 nut, to hold motor to robot
2-56 locknut, to hold motor to robot
4-40 3/8"
4-40 1/2"
4-40 3/4"
4-40 nut
4-40 locknut
4-40 split lockwasher
2" o-ring
3" o-ring
4" o-ring
Binding post
Binding post cap

For 3d printing in the Mechatronics Lab, you will need the Prusa Slicer to create the 3d printing file from your model .STL file. The lab has several Prusa Mini+ printers and purple PLA.