Parametric dual motor syringe with enhanced design - Imperial College London

thingiverse

// UPDATED 15/12/18: Modified motor holder design optimized to ensure motor holder rigidity and to move the syringe body lip closer to the piston lip with increased precision // A single motor syringe proved ineffective for precise and high-accuracy applications, due to its inability to withstand uneven forces applied near the syringe body. Consequently, flexing occurred in the piston holder as a result of this stress. Our design counteracts this issue by employing two motors that work in tandem, exerting opposing forces on either side of the syringe. This setup obviates the need for extensive modifications and significantly enhances reliability. By incorporating two motors rather than one, we've experienced significant reductions in non-specific adsorption to the glass syringe walls, effectively minimizing contamination and optimizing performance. Notably, this parametric design remains largely adaptable, allowing users to input and experiment with an array of variables, including critical factors such as reagent viscosity. Instructions: NEMA 17 motors serve as the backbone for our design, providing adequate torque at a fraction of the overall size when compared to alternative configurations. Connecting these motors via RAMPS or sanguinololu ensures seamless communication between motors and stepper chips controlling the extruder, simplifying synchronization of actions through the connection of cables. Key considerations: To facilitate versatility across different syringe types and applications, users can readily adjust our SCAD code to account for various syringe designs by introducing subtle changes to key components like motor lip style or positioning, streamlining this complex task.