Transcript Nov 8 - Drafting 1

Communication Technology
November 8, 2010
Day 1 Drafting Objectives:
1. Learn to set up paper
1. Border
2. Title Block
3. Quadrants
2. Correctly Measure
3. Practice line weights
IOT
2-12
POLY ENGINEERING
Scaling Review
• ½ inch scale means that we represent 1 foot
by 0.5 inches
• Example 12’9” means 12 feet and 9 inches
– There are 12 inches in a foot
– 12 feet 9 inches is 12 9/12 feet = 12 ¾ feet
– On a ½ inch scale, 12 feet 9 inches is drawn as 6
3/8 inches.
IOT
2-12
POLY ENGINEERING
DRAFTING PREPARATION
• How many degrees are in a RIGHT ANGLE?
- 90 Degrees
• What is the total number of degrees in a SQUARE?
- 360 Degrees
• Divide that square in half, diagonally. How many
degrees are in each triangle?
- 180 Degrees
• How many degrees is each ANGLE in this isosceles
right triangle?
3
1 = 90 Degrees
2 = 45 Degrees
2
1 3 = 45 Degrees
2-12
IOT
POLY ENGINEERING
DRAFTING PREPARATION
• A triangle with all sides equal lengths is an
Equilateral Triangle
• A triangle with all angles equal is an
Equilateral Triangle
• A triangle with 2 sides/angles equal and 1 side/angle
different is an
Isosceles Triangle
• A triangle with all unequal sides/angles is a
Scalene Triangle
• The sum of the three angles in ALL triangles is ____
degrees.
180
2-12
IOT
POLY ENGINEERING
DRAFTING TOOLS
• Sharpened Pencil - different line weights
• Drawing Board
– Smooth, flat surface
• T-Square
– “Head” and “Blade”
– Horizontal lines ONLY
– Used in conjunction with triangle for vertical lines
• Triangles
– 30-60 and 45 triangle
– Used in conjunction with t-square for vertical lines
• Compass – circles
2-12
• Protractor – lines at angles
IOT
POLY ENGINEERING
DRAFTING TOOLS
IOT
2-12
POLY ENGINEERING
DRAFTING
• HORIZONTAL LINES
–
–
–
–
–
Hold t-square TIGHT against board
PULL your pencil, DO NOT push it
Hold pencil at slight angle to paper (60 degrees)
Twist your pencil to keep a consistent point
DO NOT allow pencil to go under t-square
• VERTICAL LINES
– Hold triangle TIGHT against t-square
– Hold t-square TIGHT against board
– NEVER use the t-square alone for vertical lines
IOT
2-12
POLY ENGINEERING
Communication Technology
PREPARATION
• Get a set of drafting tools:
– T-Square
– 1 Triangle
– ~4” Tape
– Ruler
• Turn Friday’s homework over to use the back
IOT
2-12
POLY ENGINEERING
1. Square bottom of paper to drawing board using T-Square
2. Fasten upper left corner of sheet with tape
3. Smooth to the lower right corner
2
4. Attach
3
DOUBLE-CHECK TO ENSURE
SQUARE
1
IOT
2-12
POLY ENGINEERING
5. Smooth across to upper right, then attach
6. Smooth to lower left; finish attachment
5
DOUBLE-CHECK TO ENSURE SQUARE
6
IOT
2-12
POLY ENGINEERING
1. Begin all lines as LIGHT construction lines.
2. Draw a ½” border and a ½” title block
½”
½”
3. Add 3 LIGHT lettering guidelines, 1/8” apart
IOT
2-12
POLY ENGINEERING
1. Add title block separators - Medium Weight
2. Draw diagonals to find center.
2”
3 ½”
3. Darken border lines.
2½”
1½”
IOT
2-12
POLY ENGINEERING
2”
3 ½”
2½”
1½”
LETTER the title block information:
1.
2.
3.
4.
5.
BPI-IOT
LINE WT. PRACTICE
LAST, First Initial
14 OCT 08
PER #
IOT
2-12
POLY ENGINEERING
Use the “X” in the center of your drawing space to
divide your paper vertically and horizontally.
Quadrant 2
Quadrant 1
Quadrant 3
Quadrant 4
2”
3 ½”
2½”
1½”
Darken with border lines (Very Heavy)
IOT
2-12
POLY ENGINEERING
8’-0”
Q2
Q1
Q3
Q4
14’-0”
10’-0”
6’-0”
Practice your line weights:
Q1. Light lines
Q2. Light, then medium lines
Q3. Light, then heavy lines
Q4. Light, then very heavy lines
¼”
APART
10 vertical lines, then draw
horizontals
IOT
POLY ENGINEERING