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R1 = 70 + 25 ( the circle with R1 and circle with 25 has the same tangent when they meet)
\((R_2+R_1)^2 = (R_2+30)^2 + 120^2 \) can you guess how i got that?
Trying.. to find the tangent :/
Isn't this part an arc ?
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
|dw:1444304019186:dw| Excuse me, but that's the first application of open belt, cross belt, .... etc
|dw:1444304295640:dw| Maybe the radius if is > than 25 +70
what are you suggesting? BAdhi seems to have the right idea.
I know , he 's right, but I can't understand him
Got it, I will try to plot it. and see the result
from Pythagorean Theorem
That's how you got (R_2 + R_1)^2 = (120)^2 + ( R_2 + 30 )^2
I never thought we'd use Pythagorean in engineering drawing -,-
Yes, if angle at M is 90 deg (I assume it is)
Pythagoras is one of the GREAT theorems. It pops up all the time.
A circle with 95 radius doesn't tangent -,-
what do you mean ?
Is this CAD or hand drawing?
@BAdhi Unfortunately, hand drawing, the professor said "You all should master hand drawing before moving to Auto CAD."
Thanks guys, SOLVED. Should I write down the figure the steps of how I got R2 ?
Yes, I would like to see the solution
Hand drawing is fun.. of course after a little bit of practice.. its kinda become an art ;)
@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?
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
well sorry I dont have any material in the internet that i know of :(
@BAdhi , I didn't think you will notice xD, I was trying to highlight the main lines , by using heavy lines.
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
Thanks for your time @BAdhi .
you are welcome :)