Week02 - Computer-Aided Design

Raster and Vector

At first,I recognized the difference between bitmap pictures and vector pictrues. And I know SVG(Scalable Vector Graghics)is written in XML (Extensible Markup Language) language. SVG makes your diesign exciting,high resolution pictures.You can also design pictrues by coding, and also can edit SVG pictures by any text editor. The size of SVG is smaller than JPEG and GIF format file in general, so it can upload or download quickly.

I select Inkscape to express my final project. Inkscape has some surprising powerful features, espacially its Star tool, its function shocked me.

My Inkscape Pictrues -- Final project Concept Design

I draw two pictures in Inkscape, there are about my final project. You can download the first pictrue here.

The second picture descriped my AI eqipment of my Auto Bicycle. You can download the second pictrue here.

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OpenSCAD & GraphSCAD

Description

OpenSCAD is a software for creating solid 3D CAD models. It is free software and available for Linux/UNIX, Windows and Mac OS X. Unlike most free software for creating 3D models (such as Blender) it does not focus on the artistic aspects of 3D modelling but instead on the CAD aspects. Thus it might be the application you are looking for when you are planning to create 3D models of machine parts but pretty sure is not what you are looking for when you are more interested in creating computer-animated movies.

Beauty of Mathematics

OpenSCAD is a amazing software, I found the beautify and power of mathematics according to this software. The following is a spiral_ball with different colors. You can download the file here.

Gear by OpenSCAD

I tried to create a gear module which will be used to control the direction of the bicycle. I finished it according the following steps.

Step 1: build a cover moduls

Step 2: build a axis moduls with difference function

Step 3: build a solid moduls with difference function and loop function

Step 4: build the gear moduls with difference , mirror and union functions

You can download the file here.

Gear by GraphSCAD

Thanks our Inspector Jason W , he told me GraphSCAD, a pure parametric software worked together with OpenSCAD. You can download GraphSCAD here.

This software makes me feel the fun of parametric design, thanks our Gurges Ted again.

The following is a new gear created by GraphSCAD. You can download the new gear file here.

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SolidWorks & Simulation

SolidWorks

SolidWorks is a powerful software. I will use this software to build all parts of my final project. Becasue the design of my final project has only thoughts, the details is still in processing.

In my final project, the stepper motor is one of the direction control device, and a different stepped motor will be used in balance control device. So i create a 3D stepper motoe in Solidworks. You can download the new gear file here.

If you download this file, compare with the above gear file,you will find the diffence of file size,this file is bigger.

Simulation

Simulation is a much useful in engineering design. I know nothing about it, but I am very interesting in it, this time I try this software simply.

Step 1: Create a part.

Step 2: Assign ABS material to the part.

Step 3: Add fix force in the bottom side.

Step 4: Add load on the bottom, the load value is 50N.

Step 5: Simulation result.

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Assignment: