octagon unequal sides

Experimenter
Experimenter

I need to create an octagon block which is located in the drawing by it's center point.  Overall dimensions must be fixed (156 x 156), and all vertical and horizontal sides are to be equal and related (starting with 146, but adjustable). The 45 degree angles will relocate and resize to connect the other four sides, but the 45 degree angle will be maintained.  Of course, the vertical and horizontal sides must remain centered on the center point.

 

Or would it be easier to draw a square and chamfer the corners?  How would I do that?

 

Thanks.

4 REPLIES

Hi Mark,   There is a "Polygon" tool in the "Draw" tab th...

Esteemed Contributor
Esteemed Contributor

Hi Mark,

 

There is a "Polygon" tool in the "Draw" tab that will do what you need.

 

SE_ST6_Draw_PolygonByCenter_A.png

 

Place the center using the base coordinate system [check "Base", in pathfinder if not displayed]...follow the prompts to set number of sides, distance, etc...

 

SE_ST6_Draw_PolygonByCenter_B.png

 

Add some midpoint relationships & a dimension......DONE!

 

SE_ST6_Draw_PolygonByCenter_C.png

Sean Cresswell
Design Manager Streetscape Limited
Solid Edge ST10 [MP2] Classic [x2 seats]
Windows 10

You must have Maintain Relationships on and it is easier...

Esteemed Contributor
Esteemed Contributor

You must have Maintain Relationships on and it is easier if they are displayed...

 

  1. Draw a circle and change it to Construction.
  2. Place a dimension on this to hold it at 156.
  3. Draw your Octogon inside the circle but not touching yet.
  4. Place Horizontal/Vertical relationships on the top bottom and 2 side segments.
  5. Place an Equal relationship between one of these elements and each remaining of these elements
  6. Place an angular dimension on the 45 degree segments to hold them at 45°.
  7. Use the Connect relationship to connect the edges of you Octogon to the circle (be careful as doing this may cause lines to flip)
  8. Add a dimension to one of the side you wish to control (initially 146, but adjustable)

Thanks,
Ken

Production: ST9 MP10
Testing: ST10 MP1

Re: You must have Maintain Relationships on and it is easier...

Solution Partner Legend Solution Partner Legend
Solution Partner Legend
Why not just start with the Polygon by center and add the relationships you desire. http://screencast.com/t/3d7gaDgkfa
Matt Johnson
Application Engineer
Ally PLM Solutions
matt.johnson@allyplm.com
http://allyplm.com/

Re: You must have Maintain Relationships on and it is easier...

Esteemed Contributor
Esteemed Contributor
You could do that, but in doing so you would first have to delete the relationships you don't need (equality) and then add back the ones you need plus any additional ones. It's one of those "6 of one, half dozen of the other" deals.

Thanks,
Ken

Production: ST9 MP10
Testing: ST10 MP1