Prototyping

Servo Motor

To ensure more even distribution of air from the T-connector outlets, we wanted our aluminum poles to move slightly during operation. After experimenting with various mechanisms, we decided on a timing belt and pulley system. We 3D printed pulleys for both the motor and the pole, and tested the setup using an open GT2 timing belt available in the lab. We used a 20-tooth pulley for the motor and a 60-tooth pulley for the aluminum pipe to maximize torque. The setup was designed to maintain a 10 cm distance between the motor and the pipe, which was compatible with the GT2 belt length we had sourced for.

 

Fan

We 3D printed a custom nozzle to connect the fan to the aluminum pipes, ensuring efficient airflow into the pipes, as well as a mount to securely attach the fan onto the aluminum profile frame.

Upgrades

Downscaling

We decided to downscale our rack to handle just one t-shirt, as the original large setup made it difficult to assemble and test components like the load sensor, fans, and motor. A smaller rack also helps minimise wiring issues and makes it easier to organise our setup. This downscaling allows us to focus on refining the core mechanisms of our prototype—such as motor movement, airflow, and load sensing.

Other changes

We added platforms on both sides of the rack to mount our fan, motor, and other electrical components.

Additionally, we lowered the position of the load sensor so that the groove in the upper platform aligns the aluminum poles at the same level as the motor. This alignment ensures that our pulley system functions smoothly.

We also decided to mount two fans to the top pole instead of one in order to increase airflow so that t-shirt will dry faster especially since we might not be including the heating element as it was not working as desired.

(insert sarah’s prototyping)

Coding

Our coding expert, Angeline, along with Cheyenne, finally figured out how to integrate the code to run the fan, motor, and load sensor simultaneously.

We also tackled cable management by organizing and labeling all the wires, making future assembly much easier.

Lastly, we welcomed our latest member, Ellie, who has a real knack for electronics. She keeps everything neatly organized and ensures our components are always within reach—an absolute lifesaver during prototyping!