+ Reply to Thread
Page 2 of 15 FirstFirst 1 2 3 4 12 ... LastLast
Results 11 to 20 of 145
  1. #11
    Luminous Being JD Mather's Avatar
    Using
    Inventor 2015
    Join Date
    Sep 2007
    Location
    Williamsport, PA
    Posts
    8,719

    Default

    Registered forum members do not see this ad.

    Next draw this cyan (blue) arc and yellow arc.
    The centers of these arcs are on the red circle.
    There is a bit of a trick to locating the center points - post back if you don't know the trick.

    involute.jpg

    Post your file here when you have finished this step.
    Certified SolidWorks Professional
    Autodesk Inventor 2015 Certified Professional
    Autodesk AutoCAD 2013 Certified Professional

  2. #12
    Senior Member
    Using
    Mechanical 2012
    Join Date
    Dec 2012
    Posts
    133

    Default

    Quote Originally Posted by JD Mather View Post
    Next draw this cyan (blue) arc and yellow arc.
    The centers of these arcs are on the red circle.
    There is a bit of a trick to locating the center points - post back if you don't know the trick.

    Attachment 39374

    Post your file here when you have finished this step.
    I don't know the trick.
    Attached Files

  3. #13
    Luminous Being JD Mather's Avatar
    Using
    Inventor 2015
    Join Date
    Sep 2007
    Location
    Williamsport, PA
    Posts
    8,719

    Default

    The trick is to simply draw a circle with the desired radius (in this case big_R or r.2675) with the center at a location that you do know. Where that circle passes through the reference circle is one of two possible locations for the desired centerpoint. The one of the two possible points you need is visually obvious.

    Center Trick.PNG draw second yellow arc at rightmost intersection of yellow arc shown and red arc. Delete the original yellow circle and trim the second yellow circle beween the pitch circle and the addendum circle as shown in my earlier post.
    Repeat for little_r
    Certified SolidWorks Professional
    Autodesk Inventor 2015 Certified Professional
    Autodesk AutoCAD 2013 Certified Professional

  4. #14
    Senior Member
    Using
    Mechanical 2012
    Join Date
    Dec 2012
    Posts
    133

    Default

    Quote Originally Posted by JD Mather View Post
    The trick is to simply draw a circle with the desired radius (in this case big_R or r.2675) with the center at a location that you do know. Where that circle passes through the reference circle is one of two possible locations for the desired centerpoint. The one of the two possible points you need is visually obvious.

    Attachment 39378 draw second yellow arc at rightmost intersection of yellow arc shown and red arc. Delete the original yellow circle and trim the second yellow circle beween the pitch circle and the addendum circle as shown in my earlier post.
    Repeat for little_r
    This is my gear in the attached .dwg file.

    Why the shape of the tooth is different compared to the attached image?
    Attached Images
    Attached Files

  5. #15
    Senior Member
    Using
    Mechanical 2012
    Join Date
    Dec 2012
    Posts
    133

    Default

    Where is its epicycloid and the hypocycloid?

  6. #16
    Luminous Being JD Mather's Avatar
    Using
    Inventor 2015
    Join Date
    Sep 2007
    Location
    Williamsport, PA
    Posts
    8,719

    Default

    Where did that come from.
    I didn't instruct you to do that?
    In my first reponse I asked if you could follow instructions!

    I guess I didn't write it exactly like that, but
    Are you willing to work through the entire process - beginning to end (read, not so easy)?
    I was walking you to the solution step-by-step. You missed my last step.
    Post file that looks like #13.
    Last edited by JD Mather; 26th Dec 2012 at 06:27 pm.
    Certified SolidWorks Professional
    Autodesk Inventor 2015 Certified Professional
    Autodesk AutoCAD 2013 Certified Professional

  7. #17
    Senior Member
    Using
    Mechanical 2012
    Join Date
    Dec 2012
    Posts
    133

    Default

    Quote Originally Posted by JD Mather View Post
    Where did that come from.
    I didn't instruct you to do that?
    In my first reponse I asked if you could follow instructions!

    I guess I didn't right it exactly like that, but

    I was walking you to the solution step-by-step. You missed my last step.
    Post file that looks like #13.
    I thought that was the last step.

    I will post the .dwg file that looks like #13.

  8. #18
    Quantum Mechanic ReMark's Avatar
    Computer Details
    ReMark's Computer Details
    Operating System:
    Windows 7 Pro 64-bit
    Computer:
    Thinkmate
    Motherboard:
    Intel DX58SO2 LGA1366 X58
    CPU:
    Intel i7-960 Quad-core 3.20GHz 8MB cache
    RAM:
    12GB (3x4GB) PC3-106000 DDR3
    Graphics:
    nVidia Quadro K4200, 4GB GDDR5
    Primary Storage:
    150GB Velocipraptor 10,000 rpm
    Secondary Storage:
    none
    Monitor:
    Dell P24LLH - 24" wide screen LCD
    Discipline
    See details...
    ReMark's Discipline Details
    Occupation
    CAD Draftsman/Designer...chemical manufacturing.
    Discipline
    See details below.
    Details
    I work for a specialty chemical manufacturer. I do a little bit of everything from P&IDs to civil to architectural and structural.
    Using
    AutoCAD 2018
    Join Date
    Nov 2005
    Location
    Norwalk, CT USofA
    Posts
    46,375

    Default

    Got to pay attention in class.
    "I have only come here seeking knowledge. Things they wouldn't teach me of in college." The Police

    Eat brains...gain more knowledge!

    I'm now a full member of the Society for the Promotion of Mediocrity in CAD. Standards? We don't need no stinkin' standards! Take whatever advice I offer and do the opposite.

  9. #19
    Senior Member
    Using
    Mechanical 2012
    Join Date
    Dec 2012
    Posts
    133

    Default

    This is the .dwg file that looks like #13.
    Attached Files

  10. #20
    Luminous Being JD Mather's Avatar
    Using
    Inventor 2015
    Join Date
    Sep 2007
    Location
    Williamsport, PA
    Posts
    8,719

    Default

    Registered forum members do not see this ad.

    Now draw circle with center at intersection of yellow circle and red circle as shown.

    Big_R.PNG
    Certified SolidWorks Professional
    Autodesk Inventor 2015 Certified Professional
    Autodesk AutoCAD 2013 Certified Professional

Similar Threads

  1. how to draw Spur gear tooth profile drawing in auto cad
    By asif shafiq in forum AutoCAD General
    Replies: 3
    Last Post: 12th Jul 2014, 09:35 pm
  2. Helical Gear Tooth Profile
    By wasim khan in forum AutoCAD Beginners' Area
    Replies: 6
    Last Post: 6th Jan 2014, 12:11 am
  3. Bevel Gears (again) - how to modify the non-tooth body of the gear
    By Gary Barker in forum Autodesk Inventor
    Replies: 16
    Last Post: 22nd Nov 2011, 07:10 pm
  4. How to draw gear like this?
    By Random one in forum AutoCAD Beginners' Area
    Replies: 21
    Last Post: 24th Aug 2009, 06:37 pm
  5. how do i draw a gear
    By alain in forum AutoCAD General
    Replies: 4
    Last Post: 24th Sep 2006, 10:21 pm

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts