CAD week 1

Tuesday, February 02, 2010
We began to discover about the purpose of CAD and learned the basic drawing tools for CAD
Basic Drawing Equipment 1-3

BASIC DRAWING / OFFICE EQUIPMENT - 1
Drawing Pencils - are a basic requirement of any graphics course. You need a number ranging from 2B to 2H.
A refillable pencil - a very useful especially if you are constructing a drawing that needs a constant thickness of line
Ink fountain - pens that can be used for producing ‘fancy’ styles of writing.
A protractor- is used to measure angles.
A compass - this is used for drawing small circles very accurately

BASIC DRAWING / OFFICE EQUIPMENT - 2
A fine pen - (colour - normally black) is used to draw permanent, accurate lines
T-Squares - are use to draw horizontal lines. They are especially useful when constructing accurate orthographic drawings or architectural drawings
Set Squares - are used to draw accurate angles
Board clips - are used to hold the drawing paper in position when drawing, sketching or attempting basic graphics work the equipment shown below is very useful and sometimes essential.
A fine pen - (colour - normally black) is used to draw permanent, accurate lines. Fine pens are available with various thicknesses of 'tips'. They are especially useful for printing and placing notes alongside designs and sketches. They are also used for producing the final outline of a design. Fine pens are relatively cheap and come in a range of colours.
T-Squares - are use to draw horizontal lines. They are especially useful when constructing accurate orthographic drawings or architectural drawings. A T-Square is normally used with a drawing board, set squares and clips. It must be pushed firmly against the edge of the drawing board when it is being used.
Set Squares - are used to draw accurate angles. The most common are 45 and 60/30 degrees. When using set squares they should always used along with a T-Square. The Set-square rest on the straight edge of the T-Square and this ensures when the angle is drawn that it is accurate.
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Board clips - are used to hold the drawing paper in position. They simply clip on to the board holding the paper firmly against the drawing board
A ruler - is possibly one of the most important pieces of drawing equipment. Rulers should only to used to measure distances with lines being drawn with T-Squares and Set Squares.

BASIC DRAWING / OFFICE EQUIPMENT - 3
Circle templates - are very useful. They are plastic with a number of accurate circles cut out. They are used to draw circles of set diameters/sizes and are particularly useful if the circle is small.
A craft knife - is used to cut out card shapes It is important that a steel ruler is used as the sharp blade of the craft knife is less likely to slip
A scissors - is used for general cutting and shaping of paper and card.
Pencil sharpeners - are essential for sharpening pencils.
A craft knife - can also be used to sharpen pencils.

EXPLODED VIEWS - 1
Exploded views are often a good way of showing detail. The drawings below show two types of similar pens. One is a fine line felt pen used for drawing precise, fine lines. The other is a fountain pen and it is used to write letters etc.... Both pens have been drawn as ‘exploded views/drawings’. In an exploded drawing the pens are drawn with all their parts disassembled (taken apart). It is important to recognise that all the parts are in line with each other, drawn usually along a centre line which is drawn through the centre of the design. \

INTRODUCTION TO THIRD ANGLE ORTHOGRAPHIC DRAWING
Orthographic drawing is a way of drawing a three dimensional object. Normally the object is drawn as three separate, related views - Front View, Side View and Plan View. The example below shows a simple shaped block, with a hole drilled all the way through. The front view, is a drawing of the block, as if you are looking directly at the front of the object.The side view, is a drawing of the block, when it has been rotated so that one of its sides is now directly in view.The plan view, is a ‘birds eye’ view, from above.
http://www.technologystudent.com/designpro/drawdex.htm





Wednesday February 03.2010

Absolute- (2,1) (4,1) (4,4) (2,4) (2,1)
Relative - (2,1) @2,0 @0,3 @ -2,0 @0,-3
Polar - 2,1 @ 2,<0 @3<90 @2<180 @3<270

Thursday, February 4th, 2010

Continued to learn about CAD and graphing simple objects. We also learned about creating a grid size appropriate to the shape being created. A texas star was created to demonstrate our knowledge so far on CAD

Friday, February 5th, 2010

We learned about trim and Offset. Offset allowed us to duplicate a line so that it would become parallel and at a set distance from the original line. Trim allowed us to delete lines that were not being used by selecting two lines, and clicking on the lines in between these lines that are needed to be deleted