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leeminardi
en respuesta a: SEANT61

Here's a way to get an exact solution graphically using AutoCAD.  Start with my "start drawing" that has the concentric constraint (see my previous post).

 

1. Create a circle with a radius equal to the eccentricity of the blue block (rBlue = 1.0) centered at the target (yellow circle).

2. Create a circle with a radius equal to the eccentricity of the green block (rGreen = 1.0) centered at the center of the red circle (cyan).

 

These two circles intersect at two locations. You can use either solution.  

 

Using the top left intersection we measure the angle to rotate the green block:

  - from the top left intersection point of the two circles

  - to the insertion point of the green block (the center of the large green circle

  - to the center of the small blue circle

( rotate the green block  -29.774 in the step1 drawing)

 

After rotating the green block measure the angle for the blue block rotation:

- from the center of the target

- to the insertion point of the blue block 

- to the center of the eccentric circle of the blue  block

( rotate the blue block -27.061 in the step 2 drawing yield the Done drawing)

 

DoubleEccentric.JPG

 

~Lee

 

 

 

 

 

 

 

 

lee.minardi