w.1.homw web.jpge

Week 2
Computer-Aided Design

Welcome to my 2th week of Fabacademy. 😀

The task list for this week:

  • Model (draw, render, animate, simulate, ...) a possible final project.
  • post it on your class page with original 2D and 3D files.

2D Designe

This week I focus on exploring various 2D & 3D design software. Let's see the first 2D design

Raster Vs Vector:

2D image designs are classified into two major categories

  • Raster.
  • Vector.
image not found

  • Raster: Raster img are made of pixels or tiny dots that use color and tone to produce the image.

  • Vector: Vector graphics are digital art that is rendered by a computer using a mathematical formula.

In the following table, I covered the difference between vector and raster to know more about it check this blog.

image not found

As an engineer, I have a little bit of a good hand on CAD software but I have not explored 2D modeling up till now . Software like gimp, photoshop are known to me but I am going to explore them for the 1st time in my life. 2D designing.

Inkscape:

To start with the 2D design I started learning Inkscape. As it's open source and most of the content is available online.
Here is how I started learning it.

Downloading and installing Inkscape.

image not found

It’s very simple to download and install Inkscape. You just have to go to Inkscape.org And select the version based on your OS. As I use Windows, I select the Windows version of Inkscape and download it into my system. I got a .exe file. For installation I just opened it.

Step 2. Exploring the user interface and layout.

Usually, whenever I start exploring any new software for the 1st time I use to read the manual of the software which provides basic information about it.

image not found

This is the basic interface of Inkscape I got from their user manual.

Step 3. :Now its time to make some thing using inkscape.So i decide to try one of tool for tracing a bitmap image into a path .for that I fallow this tutorial from Inkscape manule you can find such side tutorials on there side .

Step4:Opening the application and Import a Image for tracing a bitmap image into a path. I use the same illustration image of me for this activity.

image not found
image not found

Step5:Then I select the path from the menu bar in path select trace bitmap option .update it for selected Image.

image not found

image not found

Step6:Its show the preview of the trace bitmap generated .Then apply the operation for the selected image by clicking on apply option.It will automatically generate a teace bitmap.

image not found
image not found

Step7:Then I fine adjusted the design using path tool editor and I used setstroke to map the boundry of design.

image not found
image not found

Step8:After maping the boundry of image I use Creat and edit text object tool to wright name below the edited path.

image not found
image not found

Step9:After this I added a boundry box to the design using the box option and coloured it like shown in the image using spray option .

image not found
image not found

GIMP:

I use gimp for dearkening the fent lines on my sketch using brightness controller tool.

image not found

image not found

I also tyr Bim plugin in Gimp for compressing img.

3D Designe:

Fusion 360:

I need a connection element design for my burner So i tried to design one in Fusion 360.

image not found

1.Start with sketch mode Drawing some circles:

image not found

.

2.Defining dimensions for circles and there distance from each other :

image not found

.

3. Using tangent constraint:

image not found

.

4.Detected Off set which can be a problem for Design.

image not found

.

5.Use Concentric constraint for making circle center allina.

image not found

.

6.Convert construction line to object line :

image not found

.

7.Use Trim tool to remove excess lines and curves in design:

image not found

.

8.Use Extruded tool to generate body:

image not found

.

9.Select body surface and sketch circle on it:

image not found

.

10.Cut the body using Extruded tool:

image not found

.

11.Use Chamfer tool for creating chamfer:

image not found

.

12.generating body on body by extrugion.

image not found

.

13.Final Design:

image not found

.

Solid works:

I also try to design a servo motor in solid works. As I am going to use on in my final project for controlling the gas flow towards the burner.

1. I use solid works part design to Design the servo motor parts as follows.

image not found

.

2. I first draw the suitable sketch and make it 3D using the Extrude command as you can see.

image not found

.

3. Then I reuse the sketch command to Draw the sketch to attach nuts and bolts on the servo motor I also use various sketch commands this time like offset, line, construction line, circle, sketch fillet, etc.

image not found

.

4. I use the sketch mirror command to mirror the sketch items I draw and where I where symmetrical sketch parts.

image not found

.

5. After that I redraw the sketch portion on the top of the servo motor using the circle command and use dimension command to give it dimensions.

image not found

.

6. Then I use the chamfer command to chamfer the bottom edges of the servo motor body. I also use the fillet command to make sharp edges smooth.

image not found

.

7. I also draw bolts using the sketch command and then extrude them to make 3D.

image not found

.

Then I use excrude command to make them 3D and chamfer it to give them bolt like shape.

image not found

.

8. Then I again use extrude command to make a bottom output for the wiring of the servo motor.

image not found

.

9. Lastly I make a hole using cut-extrude to fold a shaft.

image not found

.

10.finally, I give the appearance to the servo body by assigning the material and colour.

image not found

.

As I make the servo body. Similarly, I make other components I need to complete my servo motor.

Servo other components.

1. Servo Horn Sketch.

image not found

.

2. Exclude the sketch to make it 3D.

image not found

.

3. Similarly I draw the sketch of the shaft and then use Exclude command to make it 3D.

image not found

.

Assembly:

1. I use solid works part assembly to assemble the various servo motor parts as follows.

image not found

.

2. I use different types of mat commands to assemble the parts such as coincident, concentric, Lock etc.

image not found

.

3. This is what the final Assembly look like.

image not found

.

Animation:

For animating the servo motor I use SOLIDWORKS Add-In where I found the SOLIDWORKS Motion feature to animate the servo motor horn motion. Its window looks life follows.

image not found

.

I modify the motion to oscillatory motion and frequency to1 Hz and rotate the motor at 180 degrees. and set the timeline to 14 sec.

image not found

.

This is the video during the animation as you can see.

This is the final Animation video I served.

Rendering:

Photo View 360:

For rendering in solid works I use photo view 360 Initially . But I don't like it . I try some Initial rendering work Edite the image quality and type as you can see in the picture.

image not found

.

After that, I move to the SOLID WORKS Visualize.

image not found

.

I assign the material and colour appearance to Its as you can see in the below image.

image not found

.

This is what the final rendered Image looks like.

image not found

.