Engineering Drawing

Engineering drawings: common features
Drawings convey the following critical information:
Geometry – the shape of the object; represented as views; how the object will look when it is viewed from various standard directions, such as front, top, side, etc.
Dimensions – the size of the object is captured in accepted units.
tolerances – the allowable variations for each dimension.
Material – represents what the item is made of.
Finish – specifies the surface quality of the item, functional or cosmetic. For example, a mass-marketed product usually requires a much higher surface quality than, say, a component that goes inside industrial machinery.

Line styles and types

Standard engineering drawing line types
A variety of line styles graphically represent physical objects. Types of lines include the following:
visible – are continuous lines used to depict edges directly visible from a particular angle.
hidden – are short-dashed lines that may be used to represent edges that are not directly visible.
center – are alternately long- and short-dashed lines that may be used to represent the axes of circular features.
cutting plane – are thin, medium-dashed lines, or thick alternately long- and double short-dashed that may be used to define sections for section views.
section – are thin lines in a pattern (pattern determined by the material being "cut" or "sectioned") used to indicate surfaces in section views resulting from "cutting." Section lines are commonly referred to as "cross-hatching."

Orthographic projection
The orthographic projection shows the object as it looks from the front, right, left, top, bottom, or back, and are typically positioned relative to each other according to the rules of either first-angle or third-angle projection.
First angle projection is the ISO standard and is primarily used in Europe. The 3D object is projected into 2D "paper" space as if you were looking at an X-ray of the object: the top view is under the front view, the right view is at the left of the front view.
Third angle projection is primarily used in the United States and Canada, where it is the default projection system according to BS 8888:2006, the left view is placed on the left and the top view on the top.
Not all views are necessarily used, and determination of what surface constitutes the front, back, top and bottom varies depending on the projection used.

Chapter 1 quizes 1-6

CHAPTER ONE QUIZES!



QUIZ 2



Quiz 3





Quiz 4



Quiz 5

Week 4

Monday February 22
Today we worked in google sketch on our roller coasters. We continued making the support beams and added a bump to the track. We also started creating beams for our roller coaster loop

Tuesday February 23

We continued the final part of the track that reconnected back up to the start of the track. We continued to copy and paste the beams so that they were aligned with specific spacing between them

Wednesday February 24
At the start of class today we started off by doing 6 short quizes and pasting them on our blog. Today we started to design the track. We used trial and error to specify how we wanted the track to look. We used many different cylinders but nothing seemed to work. We will figure out tomorow what we are going to do for our track

Thursday, February 25
Today I thought of a design for the track. I could not find a bend tool for the tubes so i instead will use the stretch tool and copy and paste and rotate tool to place the parts of track in the appropriate spots.

Friday, February 26
Today I continued placing the track on top of the support beams. I copy and pasted the previously used part of track and pasted it so that it would be attached to the peice behind it. I also grouped the peices together so i could rotate them and move them easier

Roller coaster Desinging elements and ideas

Requirements: The roller coaster must have an initial drop that is between 40 and 80 metres high. There also must be a loop in the roller coaster and an initial hill. The

Key Features: I will design the starting point where the roller coaster is launched from. I will then design a hill ascending upward out of the launch pad. At the top of this hill a slight turn will be created to prepare the suspense for a fast drop on the roller coaster. The roller coaster drop will take quickly and followed by a suden loop in the track.

Key thoughts: I will use blocks and cylinders to design most of my roller coaster. I will also use many small lines to find midpoints of where support beems should be placed. Lastly i will use a 3- cylinder design to create the track of the roller coaster

Google Sketch - Car modelling

WHMIS training

Artistic Drawing / Perspective

http://www.technologystudent.com/

Single Point Perspective

Perspective drawing is a good style to use when drawing in 3D. There are different styles including single point and two point perspective. The basic example below shows how to construct a simple single point perspective drawing of a cube. Using the same skills more complex drawings/designs can be drawn, after a little practice.
http://www.technologystudent.com/designpro/perspec1.htm

Two Point Perspective
Perspective is a realistic way of drawing objects in 3D. We have already looked at single point perspective, two point perspective using two vanishing points and when an object is drawn in this way it is even more realistic than if it were to be drawn with a single vanishing point.
http://www.technologystudent.com/designpro/twopers1.htm

Oblique

Oblique projection is a method of drawing objects in 3 dimensions. It is quite a simple technique compared to isometric or even perspective drawing. However, to draw accurately in oblique projection traditional drawing equipment is needed

The technique for drawing a cube in oblique projection is outlined below, stage by stage. To draw it correctly in oblique projection three main rules must be followed:1. Draw the front or side view of the object.2. All measurements drawn backwards are half the original measurement.3. 45 degrees is the angle for all lines drawn backwards.
A. Draw the front view. Remember to use a T-square and 45 degree set square.
http://www.technologystudent.com/despro2/obli1.htm

Isometric


Isometric drawing is way of presenting designs/drawings in three dimensions. The example below has been drawn with a 30 degree set square. Designs are always drawn at 30 degrees in isometric projection. It is vital that drawing equipment such as T-squares and 30/60 degree set squares are used carefully. The drawing paper should be clip securely to a drawing board.
http://www.technologystudent.com/despro_flsh/isomty2.html