Equipment, Scales, and Circles
Take Notes: You can use your hand written notes during the tests
Basic Hand Drafting Equipment
Scales
Full Scale / Scale 1:1
· When objects are drawn at full size.
· When objects are drawn at full size.
Reduced Scale
· When large objects, such as a house, are too big to draw full scale they must be reduced.
· Example - if drawing an object half the true size this would be written as Scale: 1:2
· Example - house drawn to a scale of 1:50 (if metric) or 1/4"=1' (if imperial)
· When large objects, such as a house, are too big to draw full scale they must be reduced.
· Example - if drawing an object half the true size this would be written as Scale: 1:2
· Example - house drawn to a scale of 1:50 (if metric) or 1/4"=1' (if imperial)
Enlarged Scale
· Small objects such as watch parts are drawn larger than their actual size.
· Example - watch hands drawn to a scale of 5:1
· Small objects such as watch parts are drawn larger than their actual size.
· Example - watch hands drawn to a scale of 5:1
NOTE: The scale used in a drawing must be specified in the title block.
PARTS OF A CIRCLE
- Diameter (O) = 2 x Radius (R)
- Radius (R) = Diameter (O) / 2
- Circumference (distance around)
Assignment: (Out of 13 marks)--Each answer is worth 0.5marks
1) Print out the following assignment along with its corresponding rulers page.
2) All answer sizes must be in millimeters.
2) All answer sizes must be in millimeters.
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