Challenge: Construct a Distinctive Coin Sorting Device.
Overview: You are tasked with designing and building an original coin sorting system that can accurately separate U.S. pennies, nickels, dimes, and quarters. Your solution should demonstrate both technical proficiency and creative thinking, resulting in a device that is unlike existing commercial products.
Disk compenent of sorting Subsystem has holes slightly bigger than the coins diameter so only the right coins fall in. In a circular pattern, smallest to largest to prevent dimes in the quarter hole.
Image of the coin disk being cut out of cardboard using the Wazer Lazer Cutter. The final version included a layer of tape ontop pre cut to add a smoother texture on the surface.
Fly wheel component of the sorting subsystem has slots evenly spaced larger than the diameter of a quarter in a circular pattern so the coins will fall into a spot and be rotated around the device and placed above the holes on the disk component.
In the GIF on the right you can see the switch being turned on and spinning the fly wheel inside the device, resting inbetween the hopper and the disk component.
The collection bins consist of two parts, the base disk, shown in RDWorks on the left, and the wall pieces below. the four bins are evenly spaced and positioned underneath the holes in the disk component of the sorting system.
The final assembled sorting bin system is picture on the right, the seperation walls were hot glued in place, and wooden pins were added on the perimeter to transfer the load of the rest of the device to the ground instead of pushing the bins up into the fly wheel.
The hopper subsystem was designed in Solidworks and 3D printed due to its complexity. the image on the left shows the construction view of the solidworks part, showing the slant of the dropping area, and the diffusers used to seperate the coins into different areas of the sorting system to prevent jams.
The image on the right shows the hopper being 3D printed, clearly showing the sloped ramp and diffusers at the end.
The image on the left shows the hopper subsystem incorporated into the device with the perimeter wall keeping the coins contained. The coins get dropped into the sloped section, they slide into the diffusers, and drop onto the fly wheel which spins the coins over top of the disk compnent with the coin holes, and the coins will fall into the proper bins at the bottom.
The four images below depict different angles of the device during diffeent stages of Assembly.
Sorting subsystem in place
Outside view of device
Under side of the bins
Power Switch for motor
Final video of the device testing, the video shows the coins being dropped into the device while being timed with a stopwatch in the bottom left. Sorting the coins at a small quantity with 100% accuracy in a time of 6.91 seconds.