Group 2 – BioBuddy Labs

The objective of this project is to design an affordable autosampler, particularly aimed at laboratories working with small sample volumes and microfluidic devices, with a compact footprint to easily fit into small workspaces. The durable design improves user experience via the automation of tasks such as calibration and temperature control, while maintaining the precision that users require. The movement of the carriage is similar to that of 3D printers, using an XY-core belt and lead screw system. The distribution of fluids utilizes a peristaltic pump which achieves accuracy as well as prevention of contamination in the samples. Performance was further optimized to prevent cross-contamination by automating the cleaning cycle of the main fluid lines after each sample is processed. Limit switches are in place to detect maximum positions, which simplifies setup for the user. A solid-state Peltier cooler is used for cooling, which offers simplicity as well as savings in cost and size. A liquid cooling loop that contains a radiator, fans, a pump and cooling block effectively dissipates heat generated by the Peltier cooler in an efficient and straightforward design. The structure allows for flexibility in both sample storage and configuration. The sample tray employs a modular system to accommodate a variety of vial types as well as quantity of vials, with interchangeable slots for three sample trays as well as a reservoir for cleaning solution. The sample temperatures are consistently maintained throughout the system as they remain in contact with the cooling system. The shell itself is acrylic which provides full visibility throughout operation, while preventing accidental interference of system movement by users. The placement of buttons allows for easy access and intuitive operation, enhancing user experience. Finally, the electrical system allows for each component to receive adequate power under maximum load while allowing for precise control.