DRV8825 Stepper Motor Driver Carrier

This driver could drive the stepper motor in 6 microstep resolutions from full step to 1/32th. It is able to supply as high as 47V to the motor (our motor had ratings lised when supplied with 48V), although the output current is only 0.75A/phase, it could still fulfill what is required for our motor (0.67A/phase). 0.7V is the highers Input Low Voltage while Input High is from 2.2V to 5.25V. The internal current control PWM frequency is 30kHz.

The driver needs to be programmed with Arduino, which is an open-sourced C based language. I have contacted ICT for administration right to install it on the PC I am using at mid-day, wish I will get a reply by Tuesday.

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Introduction

TraumaBot aims to revolutionise the way that patients, injured during a traumatic event such as a car accident or bomb blast, are managed by the medical profession with the ultimate goal of reducing fatalities. This project aims to take life saving treatment, currently only seen within the hospital setting, to the scene of the accident to ensure those preventable deaths can be avoided through fast intervention. Termed TraumaBot, this dual armed remote presence robot will be capable of undertaking diagnostic imaging using ultrasound and be equipped to manage critical internal bleeding, the leading cause of death within this patient group.

This project will be focused on the stabilisation of the system which enables remote presence ultrasound during transition while the patient is not still.

Objectives

The aim of this project is to design a mechanism for compensating for a patient’s motion using a robotically positioned ultrasound probe. The motions accounted are acceleration, deceleration and centripetal forces to enable accurate imaging to be obtained. This is in addition to the general physiological motion of respiration that will ultimately occur in addition. Motion compensation and force stabilisation has to be implemented so the force amplitude and direction of the Ultrasound probe remain constant against the body during investigation.

The Ultrasound Handle

Monday, 25 March 2013

Stepper Motor Driver

DRV8825 Stepper Motor Driver Carrier

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