Engineering Drawing Mr. Tanaka Drawing exercise I have the blocks that arranged on
weekend. With your block, position your block in the way that is drawn. You wont be able to make the one I have! Viewing an object
There are six sides on the drawing below Understanding scale If an object is too large or too small to draw on a piece of paper, a drawing can be scaled down or up. 12 inches =12=1
The scale for the L-shaped box is 1/2 or 1:2. It means that the drawing is a half of actual size. Question: How long should 3 side of
the object be in this drawing? What would the scale on the drawing be if you wanted to make it three times bigger than the actual object. Practice! What is the scale if a 4-inch length on the drawing corresponds to a 4-foot length on the actual objects? Scale: ___ in.: ___in. or ___: ___. Practice, Practice
A building has a wall of windows that is 12 feet across. If a scale of 1:24 is used, how wide is the wall of windows on the drawing, in inches? Practice, practice, practice Car designers build models of new designs because, unlike a drawing, a
model can be seen from all sides. If you built a 1:10 scale model of a car that is 15 feet long, how long would the model be? Give your answer in inches. Last one! In you are a carpenter following a 1: 20 blueprint for a house and you measure on wall on the blueprint to
be 8 inches long, how long should you build the wall for the house? Give your answer in inches. Oh, actually one more If you discovered that the architect who made the blueprint made a mistake, and the scale should really have been 1:25, how would you need to change the length of the wall of
the house? Four types of drawings Orthographic drawing Oblique drawing Isometric drawing Perspective drawing
Orthographic Drawing Orthographic drawings show the top, sides, and the bottom of an object. Isometric Drawing
Isometric drawings show the front, top, and right-side vies. Depth is shown by slanting the edges up at a 30 degree angle from the horizon. This is especially useful to engineers because it shows depth, and each line is drawn to scale. Oblique Drawing
show the front, top, and one side of an object. The front face of the object is drawn as though you are looking at it from the front. Horizontal edges are
drawn back from the front at a 45 degree angle. Lines are NOT drawn to scale. Perspective Drawing
Show objects as they would appear to the naked eye or in a photograph. Lines showing depth converge toward an imaginary vanishing points. This creates the appearance of distance
Artists and architects Like oblique and perspective drawings because they make it easy to picture what buildings and other three-dimensional objects look like in the real world. Engineers dont like them. Why do
you think that they prefer isometric and orthographic, but not perspective?? Isometric and Orthographic Isometric and orthographic drawings are used for manufacturing drawings.
Why do you think that is? Lets Try It!! Step
Step Step Step Step Step 1: 2: 3: 4: 5: 6:
Front View Top View Right-side View Confirm Measurements Erase the construction lines Dimensions and labels Isometric Orthographic Orthographic Isometric
Project 1: Engineering Drawing To Dos Make something with blocks Make the isometric drawing of the blocks Make the orthographic drawing of the blocks Grade
Completion: 60% Complexity: 20% Neatness: 20% Completion Complete all steps Step 1: Front View Step 2: Top View Step 3: Right-side View Step 4: Confirm Measurements
Step 5: Erase the construction lines Step 6: Dimensions and labels Complexity Make it as complicated as you can Very complicated: 20% Complicated: 15% Kind of complicated: 10% Not very complicated: 5%
Neatness Draw all lines with rulers! Very neat: 20% Neat: 15% Kind of neat: 10% Not very neat: 5%
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