Involute curve according to initial and final radius vector R1, R2  

      Each point P from a straight line, which rolls on a circumference with radius Ro,
      without sliding, circumscribes a circular evolvent curve.

  Layout of the dimensions
 
     

 

 
 Ro=  mm.
 start radius vector R1=  mm.
 end  radius vector R2=  mm.
 
  Number of points  N =  according to which it is plotted


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