Basically a raster image is composed of pixels that all together create a bitmap. A vector uses math to create paths from point to point. Raster file sizes tend to be larger than vector file sizes since there is more to read in a raster.
I downloaded Inkscape on my laptop to start modeling my project in 2D. It was pretty simple to navigate and use.
Trace Bitmap is used to convert the raster file to vector so that we can get a closed fixed boundary and feed to CNC machine.You can find trace bit map on Objects section.Tracing is done by color based and boundary based.
For laser cutting a part for final project i created vector image of a part attached to rack and pinion setup which represent the time numbers.i created a rectangle with 500mm*40mm then text typed in numbers and using clone tool i incorporated box to all the numbers, therefore it look cool.
This is Inscape interface.I found its easy to navigate in Inkscape. I visited document properties for establishing the canvas size and or you can resize the canvas to fit in to drawing.
It is a freely distributed program for such tasks as photo retouching, image composition and image authoring.
>Full suite of painting tools including Brush, Pencil, Airbrush, Clone, etc.
>Sub-pixel sampling for all paint tools for high quality anti-aliasing
>Extremely powerful gradient editor and blend tool
>Supports custom brushes and patterns
>Tile based memory management so image size is limited only by available disk space
>Virtually unlimited number of images open at one time
Using Free Select Tool
The Free Selection tool, or Lasso, lets you create a selection by drawing it with the pointer.First create the starting point clicking on your image. Then,
>>Maintaining the mouse button pressed (i.e click-and-drag), drag to draw a free hand selection. When end point comes superimposed on the starting point, release the mouse button to close the selection.
>>If you click on the end point, it turns accompanied by a moving cross. Then, dragging enlarges the shape.
Or release the mouse button and drag to draw a polygonal selection. When end point comes superimposed on the starting point, click to close the selection.
>>Press the Ctrl keyboard key and click on the end point: moving the mouse pointer forces moving angles to 15°; so, you can draw horizontal or vertical lines easily.
>>In both cases, double clicking on the end point closes the selection with a straight line.
In polygonal mode, this selection is a preliminary selection; ants are marching, but the small yellow circle is still present: you can copy the selection and, pressing the Backspace key, you return to the previous selection step (re-open the shape), and you can edit the selection.
>>Press Enter or double click inside the shape to validate the selection.
Coping the selected area and pasted in new layer in a new photo (basically he is like sitting with me) and using corp tool i adjusted the size and using color panel I compensated the color to look as same scene in original photo.
A YouTube Playlist
Fusion 360 CAD/CAM software connects your entire product design & development process in a single tool. It works on a cloud based server and Fusion is said to have one of the best virtual collaborative work spaces. Since I am a mechanical engineer by profession, I already knew many designing software's like Fusion 360, SolidWorks, Catia etc. and I chose Fusion 360 since it's very easy to use as well as the Fab Lab Kochi recommends using it due to the collaborative environment which helps the instructors to correct on the go.
I tried to design a part for my final project.Remember, you can only sketch on a face or a plane. Since we don’t have any solids on the screen, when starting with an empty canvas, we will be picking a plane for our first sketch.
When you start your sketch, just create something close enough to your finished geometry. You will use constraints and dimensions to tie everything down afterward.
From the closed path Sketch you can extrude the path do a definite length.By default, the extrude will start from the sketch plane from the profile that is selected.
Expand the SKETCH panel and select Rectangular Pattern. The RECTANGULAR PATTERN dialog box appears with the Objects selection button active. Select the cut feature in the sketch. Now, the dialog contains several more options, and manipulators appear near the sketch.The Direction/s button allows you to select an edge or work axis as a guide to control the direction of the pattern. Leave the pattern at its default directions.While you drag, the pattern begins to appear,You should now have a rectangular pattern of cut features(holes).
For rendering final model First in appearance tab you should set the material and color to a required entity.then navigate to final render where you have to select the image resolution,quality and path for saving the file.
Final Rendered Image
Like Trace bitmap option in Inkscpe I imported a raster image by using sketch picture command in Solid work then i adjusted the color and contrast setting to improve the trace. finally it auto traced a optimal vector outline.
Extruding the vector trace
From the trace boundary i extruded and created a 3D Model of Fab Lab logo.
I also created a plan for my final project to incorporate with the assignments in coming week.
So that's a wrap for 2nd week Assignment.
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