Developing 3D Printed Prosthetic Hand Model Controlled by EMG Signal from Forearm

The objective of this Bachelor thesis was to make a 3D printed prosthetic hand which is controlled by forearm muscles to make palm close and open. The goal of this project is to help the patients who have lost their hand in accident, disease or birth defects. The prosthetic hand is attached to the patient's forearm to replace their lost hand. Hand will be controlled by reading signals from forearm using three EMG electrodes that are attached to forearm. Fingers and palm are separate movement achieved with 6 motors, five motors for each finger and one for wrist movement. Force sensor are added to prosthetic palm finger tips to provide feedback to main MCU for motor control. The first and main task to be solved by conducting this research is to build a device helping the patient to have a prosthetic hand which can be controlled to perform simple daily tasks for example grabbing and releasing objects, since commercial solutions provided cost from 5000 to 10 000 Euros for cosmetic arm and even more for mechanical. Since the device will be attached in the patient’s forearm, the design need to be light and the size needs to be suitable to attach in the patient forearm