Spring 2016 RoFi: Mechanical Design Rev. 3

/in /by

Christopher Andelin (Project Manager)

Mario Ramirez (Systems Engineer)

Qui Du (Manufacturing Engineer)

Andrew Laqui (Electronics and Controls Engineer)

Henry Ruff (Electronics and Controls Engineer)

Table of Contents

Final RoFi 3D Modeling

Qui Du (Manufacturing Engineer)

Introduction

In Mechanical Design Rev2, https://www.arxterra.com/spring-2016-rofi-mechanical-design-rev-2/ RoFi’s head contains both the PCB and Arduino Mega.

I redesign the head to contain the PCB because my team implemented the Arduino Mega chip onto the PCB board. I also, changed to a smaller size screw for the head from M3 to M2. Since the size of the head covers is 5mm thick, having smaller screw holes give the frame more strength and they make the head look cleaner. Weight is also important therefore, I made the head as light as possible by carving holes, curving parts, and made some parts thinner.

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Figure 1: Head Update

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Figure 2: Exploded View

 

Additional frames updated

Some of the servos come loose because they slide into the frame and do not attach to the frame; to fix this problem, I designed servo locks to lock the loose servos into place.

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Figure 3: Loose Servo

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Figure 4: Servo Lock

 

Mass Report Update

My new mechanical design has a mass of 1651.51 g which is below the mass report allocation of 1745 g found here, https://www.arxterra.com/spring-2016-rofi-preliminary-project-plan/. We prefer lower mass because our current mass in conjunction with our low quality servos, RoFi tends to spasm which causes RoFi to fall over.

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Figure 5: Mass Report of RoFi’s Frame

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Figure 6: Components Mass Report

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Figure 7: Part Name Label

 

Completed Design

Note: The Arxterra Logo is just for decoration and will not be on the final product.

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Figure 8: Bonus RoFi Design

All SolidWorks 3D modeling parts and assembly can be found here, Google Dive Link

Disclaimer: All parts were created in SolidWorks 2016; older versions of SolidWorks might not open the files. I included the STL files to allow students with older version of SolidWorks to view or print parts.