Archimedes spiral according to initial and final angle parameter   

      Archimedes spiral should be circumscribed from the point P ,  which moves        uniformly on the OA ray, whereas it turns  uniformly around the stable point O. 
      Ro = is the go of P point on the OA ray for one full round.

  Layout of the dimensions
 
     

 
 
 Ro=  mm.                
 start angle   Decimal Degrees
 end angle   Decimal Degrees
 
  Number of points  N =  according to which it is plotted

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