Needle Cannulation Device

Overview

I designed and prototyped a mechatronic test fixture to automate precise needle positioning for R&D. The fixture provides multi-axis positioning control through a combination of motorized lead screws and adjustable mechanical systems, allowing precise placement relative to a target surface.

Key Features

• Height adjustment system: ratcheting mechanism with auto-locking provides secure, repeatable vertical positioning without requiring continuous motor engagement.
• Spring-loaded compliance: compression springs maintain consistent contact force against the test surface.
• Multi-axis motorized control: separate motor mounts for vertical translation and angular positioning enable complex needle trajectories.
• Modular sliding mechanism: lead screw and guide rod assembly allows smooth linear translation with minimal backlash.
• Integrated sensor mounting: dedicated adapter accommodates an ultrasonic sensor for position feedback or surface detection.
• Quick-change needle holder: set screw mounting system enables rapid needle swaps between test runs.