khoshravan Posted May 14, 2011 Posted May 14, 2011 I have a drawing given to me in paper it is two lines with an angle (83 degree) with a fillet. I know the length of fillet (arc) which is 27.04 meter. I have to draw it in Autocad. I calculate the radius of the fillet from following formula: If x is length of arc in meter and alfa the angle in radian and r the radius in meter, then x=alfa*r So I can calculate r as r=x/alfa Now in AutoCAD, I draw two lines with 83 degree angle and then fillet it with r=x/alfa, but when I use arc dimension to see the length, it is not the length I have. What am I doing wrong in this process? Quote
eldon Posted May 14, 2011 Posted May 14, 2011 If you have two lines with an angle of 83° between them, then the angle encompassed by the arc of the fillet is not 83°, but 180° - 83° = 97°. Try using the angle of 97° in your formula and see what happens Quote
khoshravan Posted May 14, 2011 Author Posted May 14, 2011 If you have two lines with an angle of 83° between them, then the angle encompassed by the arc of the fillet is not 83°, but 180° - 83° = 97°. Try using the angle of 97° in your formula and see what happens Thanks. You are correct. I made such a basic mistake:oops:. I didn't check the result but obviously I had mistake in my assumptions. I will try with this one. Thanks again Quote
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