Final Assembly

Today we finished the mounting of the motor and fixed the gimbal lock issue. Essentially, we added a weight to one of the rods within the inner ring and decided to spin the device in a slow to ensure a random tumble. The motor box was mounted using wodden blocks and self tapping screws. A significant addition that can be seen is the white piece of Teflon used as a heat resistant coupler. This will be used to prevent heat transfer to the motor:

Mounted Motor Box

Top View of Motor Box

With the assistance of Ottman Tertuliano, the triangle frames were TIG welded to the baking sheet along with two handles to enable easy placement in the oven:

We added a cylindrical weight to one of the prongs in order to offset the effects of gimbal lock. With the weight in place, the inner ring rotates more as the middle ring attempts to fall into its equilibrium position perpendicular to the outermost ring. This added rotation of the inner ring maintains the desired motion of the device. 

Added Weight to Inner Ring

Final Assembly of Device

Oven Door Puncture

Our team decided to drill the hole in the oven side that the drive shaft will feed through today. Under the supervision of Doug and Mohammed, we used a handheld drill to form the hole in the side of the oven:

Hole in Oven Prior to Cleaning

Testing the motion of the Bake³⁶⁰, we find complications with the middle and smallest ring as they appear to lock in a certain location quite often. Known as a gimbal lock, we aim to solve this problem through use of magnets, weights, or slowing the motion of the device down:

Placing the device in the oven with set blocks on the right and back, we have settled upon a desired location for the gyroscope within the oven:

Device Placement

Shaft to Coupler Placement

Drive Shaft Through Other Side

Setting Block

Coupler/Drive Shaft

Due to complications with a purchase order, we decided to manufacture our own coupler and drive shaft with steel found around the shop. With the lathe, we produced the coupler that will be in direct contact with the outer ring and the motor drive shaft on respective ends:

Motor side of coupler

Coupler

Device side of coupler

In addition, we selected a steel rod to machine as the drive shaft. Before we can machine it, we need to determine the final positioning in the oven to determine its length.:

Drive Shaft Selected for Machining

Assembly Completion

As of last night, our group was able to assemble the rings after completing final machining with the help of Bob:

Pins/Rods/Motor Completion

After changing a few designs for our motor, we assembled it. With the input of Mohamed, we decided to put "glove-like" material between the acrylic face and the oven wall  to prevent as much heat as possible from getting into the acrylic motor box. Our box will require two power sources, one for the motor and one for the Arduino:

Aiming to put the rods 120 degrees from each other in the inner ring, we threaded the ends of each of the three rods:

At the same time, we aim to machine the shafts on each of the rings today, 6 total, using the vertical machine. Given the large nature of the outer most ring, multiple supports were need to reduce the movement and vibrations associated with the cutting.We ran the tool at a feed setting of 5 and 1500 RPM:

As of 3:40 today, we were able to fully manufacture the outside ring and its spins effortlessly:

Motor Box Prototype

After reasoning out that a breadboard was unnecessary for the function of our device, we decided to to eliminate it completely, significantly reducing the size of the proposed motor box. Designing the motor with Creo, we saved the files in a cgm format to use the laser cutter:

Motor Box with the Left Panel Removed to Show Internal Components

Running the program for roughly 2 hours at 100% power, 1% speed, we produced a motor box entirely out of acrylic:

Motor Box/Freeing Rings

Having taken measurements of the electrical components, our team used the laser cutter to ensure that the holes made for the components were aligned correctly. To avoid waste, we used the acrylic that was found in the dump/recycled area that was most likely to go unused the rest of the year:

We look to fine tune the motor box model tonight in order to have the electrical components in their proposed places in time for the technical review. 

In addition, we took a hacksaw again the the steel sheet and finished the freeing process of the rings, producing three individual ones: