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TrojanPoem

  • one year ago

Engineering drawing.

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  1. TrojanPoem
    • one year ago
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  2. TrojanPoem
    • one year ago
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    I am stuck with the circle with unknown radius notice that's my first drawing

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  3. TrojanPoem
    • one year ago
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    @phi

  4. BAdhi
    • one year ago
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    R1 = 70 + 25 ( the circle with R1 and circle with 25 has the same tangent when they meet)

  5. BAdhi
    • one year ago
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    \((R_2+R_1)^2 = (R_2+30)^2 + 120^2 \) can you guess how i got that?

  6. TrojanPoem
    • one year ago
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    Trying.. to find the tangent :/

  7. BAdhi
    • one year ago
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  8. TrojanPoem
    • one year ago
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    Isn't this part an arc ?

  9. BAdhi
    • one year ago
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    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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  10. TrojanPoem
    • one year ago
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    |dw:1444304019186:dw| Excuse me, but that's the first application of open belt, cross belt, .... etc

  11. TrojanPoem
    • one year ago
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    |dw:1444304295640:dw| Maybe the radius if is > than 25 +70

  12. phi
    • one year ago
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    what are you suggesting? BAdhi seems to have the right idea.

  13. BAdhi
    • one year ago
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    circles overlap

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  14. TrojanPoem
    • one year ago
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    I know , he 's right, but I can't understand him

  15. phi
    • one year ago
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    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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  16. TrojanPoem
    • one year ago
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    Got it, I will try to plot it. and see the result

  17. TrojanPoem
    • one year ago
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    from Pythagorean Theorem

  18. TrojanPoem
    • one year ago
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    That's how you got (R_2 + R_1)^2 = (120)^2 + ( R_2 + 30 )^2

  19. phi
    • one year ago
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    He found R1 to be 95

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  20. TrojanPoem
    • one year ago
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    I never thought we'd use Pythagorean in engineering drawing -,-

  21. phi
    • one year ago
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    Yes, if angle at M is 90 deg (I assume it is)

  22. phi
    • one year ago
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    Pythagoras is one of the GREAT theorems. It pops up all the time.

  23. TrojanPoem
    • one year ago
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    A circle with 95 radius doesn't tangent -,-

  24. phi
    • one year ago
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    what do you mean ?

  25. BAdhi
    • one year ago
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    Is this CAD or hand drawing?

  26. TrojanPoem
    • one year ago
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    @BAdhi Unfortunately, hand drawing, the professor said "You all should master hand drawing before moving to Auto CAD."

  27. TrojanPoem
    • one year ago
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    Thanks guys, SOLVED. Should I write down the figure the steps of how I got R2 ?

  28. phi
    • one year ago
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    Yes, I would like to see the solution

  29. TrojanPoem
    • one year ago
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    Here you go

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  30. BAdhi
    • one year ago
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    Hand drawing is fun.. of course after a little bit of practice.. its kinda become an art ;)

  31. TrojanPoem
    • one year ago
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    @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?

  32. BAdhi
    • one year ago
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    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

  33. BAdhi
    • one year ago
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    well sorry I dont have any material in the internet that i know of :(

  34. TrojanPoem
    • one year ago
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    @BAdhi , I didn't think you will notice xD, I was trying to highlight the main lines , by using heavy lines.

  35. BAdhi
    • one year ago
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    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

  36. TrojanPoem
    • one year ago
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    Thanks for your time @BAdhi .

  37. BAdhi
    • one year ago
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    you are welcome :)

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