TrojanPoem
  • TrojanPoem
Engineering drawing.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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TrojanPoem
  • TrojanPoem
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TrojanPoem
  • TrojanPoem
I am stuck with the circle with unknown radius notice that's my first drawing
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TrojanPoem
  • TrojanPoem
@phi

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BAdhi
  • BAdhi
R1 = 70 + 25 ( the circle with R1 and circle with 25 has the same tangent when they meet)
BAdhi
  • BAdhi
\((R_2+R_1)^2 = (R_2+30)^2 + 120^2 \) can you guess how i got that?
TrojanPoem
  • TrojanPoem
Trying.. to find the tangent :/
BAdhi
  • BAdhi
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TrojanPoem
  • TrojanPoem
Isn't this part an arc ?
BAdhi
  • BAdhi
ok the arc is an part of a circle. ill use arc then when two arcs with different radii meet together, for them to have a smooth connection, the tangents of the each arc has to be same. Sorry i have circled it little bit to the left. refer the below diagram
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TrojanPoem
  • TrojanPoem
|dw:1444304019186:dw| Excuse me, but that's the first application of open belt, cross belt, .... etc
TrojanPoem
  • TrojanPoem
|dw:1444304295640:dw| Maybe the radius if is > than 25 +70
phi
  • phi
what are you suggesting? BAdhi seems to have the right idea.
BAdhi
  • BAdhi
circles overlap
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TrojanPoem
  • TrojanPoem
I know , he 's right, but I can't understand him
phi
  • phi
The curve has only one straight line, so all the places where the curve changes direction must be where the radii "line up"
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TrojanPoem
  • TrojanPoem
Got it, I will try to plot it. and see the result
TrojanPoem
  • TrojanPoem
from Pythagorean Theorem
TrojanPoem
  • TrojanPoem
That's how you got (R_2 + R_1)^2 = (120)^2 + ( R_2 + 30 )^2
phi
  • phi
He found R1 to be 95
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TrojanPoem
  • TrojanPoem
I never thought we'd use Pythagorean in engineering drawing -,-
phi
  • phi
Yes, if angle at M is 90 deg (I assume it is)
phi
  • phi
Pythagoras is one of the GREAT theorems. It pops up all the time.
TrojanPoem
  • TrojanPoem
A circle with 95 radius doesn't tangent -,-
phi
  • phi
what do you mean ?
BAdhi
  • BAdhi
Is this CAD or hand drawing?
TrojanPoem
  • TrojanPoem
@BAdhi Unfortunately, hand drawing, the professor said "You all should master hand drawing before moving to Auto CAD."
TrojanPoem
  • TrojanPoem
Thanks guys, SOLVED. Should I write down the figure the steps of how I got R2 ?
phi
  • phi
Yes, I would like to see the solution
TrojanPoem
  • TrojanPoem
Here you go
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BAdhi
  • BAdhi
Hand drawing is fun.. of course after a little bit of practice.. its kinda become an art ;)
TrojanPoem
  • TrojanPoem
@BAdhi , Do you suggest any improvements to the drawing ? I am stuck a bit in analyzing some drawings to re-draw them, is there any tutorials regarding this concept on the internet?
BAdhi
  • BAdhi
well for starter, never redraw a path that is drawn using a tool again with use of the free hand. I see that youve done that for curves
BAdhi
  • BAdhi
well sorry I dont have any material in the internet that i know of :(
TrojanPoem
  • TrojanPoem
@BAdhi , I didn't think you will notice xD, I was trying to highlight the main lines , by using heavy lines.
BAdhi
  • BAdhi
thats another point.. all the lines should be with the same intensity :P. so make sure if you cannot make the curves darker, make the straight lines and others a bit lighter using correct type of pencil (HB, 2B etc.. ) can help on that too
TrojanPoem
  • TrojanPoem
Thanks for your time @BAdhi .
BAdhi
  • BAdhi
you are welcome :)

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