Loft feature

[Anonymous]

I've done a loft for a coat hook. I've lofted it to a rail of 100 radius which went fine but when I try putting this on to a drawing and dimension it its coming out with a radius of 105 even though its still 100 in the model. Can anyone help

[beyoungjr]

Upload the dwg please and we'll try!

[Anonymous]

It's a college course so I would have to do it tomorrow. Thanks for reply though.

[Anonymous]

[Anonymous]

This is the drawing I am working from to produce the model and drawings

[beyoungjr]

Hi,

I believe that the textbook exercise is in error... The R70 dimension is not an actual arc as it is the lofted profile between the triangle and ellipse.  It is actually elliptical and the plane is not flat for that profile.  In a 2D layout I tried to show as in the textbook.  In Model Space you will see an additional Flatshot block that I made so the objects would become 2D.  Even if I explode the flatshot block the profile is not an arc so it cannot be represented as a radius.

I did however create a 3-point arc along the flatshot profile and it measured R67.  My guess is that the Author created a Leader to represent this "bogus" radius.  In creating the loft you would not need that radius at all.  You would only need the R100 arc (as a guide) to loft the ellipse and triangle to one-another.

Hope this helps?

[Anonymous]

Thanks for your help I will look at this when I finish work.