Hint:
Check Drawing limits are at default <0,0> and <12,9>
Grid and Snap spacing 0.5
Grid and Snap ON
Zoom all
DYN OFF
Start line at 1,1 and use relative postioning (or “point and shoot”) method to visit the other points. The angle is
unknown so when you get to it you’ll have to calculate either the absolute or relative position across the jump.
To enter relative coordinates type @ before the x,y values.
Setup New Drawing. For Millimeter Drawings, change limits to <240,180>
Then Choose Dimension Styles>Override and click on Fit, then choose overall scale
factor=20
and click on Primary Units, and under Angular Units select 0.00
Then Choose Format>units, then select angle precision of 0.000
This Drawing needs to be done by first calculating the true angles at each corner. Use a calculator. For example,
segment BC has an angle of 180 – 119.88 = 60.12
segment CD has an angle of (previous result) 60.12 + (180 – 104.58)
You are either adding or subtracting the “supplement” (180 – angle) to a running total.
When you get to point F you have to stop and restart at point A again, going up through J and H, etc. If you do
the math correctly both paths will intersect exactly at point F.
Set up the units as decimal, mm
Set the drawing limits to <0,0> <240,180>
Grid and Snap to 5,5
Grid on
Snap off
Zoom all
DYN on
line, first point 50,5
next point 130 tab 60.12 … etc.
Raw Angle
119.88
104.58
100.81
64.2
Supplement
60.12
75.42
79.19
115.8
Absolute
60.12
135.54
56.35
172.15
66.05
85.38
48.96
99.55
113.95
94.62
131.04
80.45
66.05
160.67
29.63
110.08
To check your drawing, insert an angle dimension at each corner to measure angle.
Use same layout as previous drawing. File > Save As and rename Ex2-9.dwg
Select whole drawing and erase
Grid and Snap ON
Start at 50,50
use line command to draw outline
use snap points to guide drawing rectangular cuts
and then trim the outer edge
use snap points to guide placement of circle centers
change center mark to line, size 2 and add center lines
use fillet to draw right arc at end of channel and corner
use fillet to draw 4 corner curves. type R to adjust Radius to 10 before choosing lines
draw left side circle and then use trim to remove left half. Add center lines.
Keep the same drawing dimensions again. File Save-As Ex 2-15
Snap On
Polygon, Center should be 120, 90, C for circumscribe, R 90
Draw the Large Circle which crosses the smaller circle centers
R-Click on circle line, Properties, Choose CenterLine, Linetype Scale = 10
Use Snap to locate center of top small circle and draw it
Choose Array, Polar, pick center point with mouse or type 120, 90
Select Objects, click on small circle, enter
Number items= 8, OK
Use Snap and line to draw inner box
This one should be easy. Use same layout from previous problem.