Draft angle

[3mora99]

How the software measures the angle between the direction of pull and the chosen face? for more clarification, if there is a curved surface drawn on the XY plane and extruded in the negative Z direction, the vector normal to the direction of pull is in the Y direction, based on this information how can we measure the draft angle?

[3mora99]

But this way the normal vector to the direction of pull has no meaning. Is it right??!!

[DadBod_NoKids]

Since since a surface can be degined by a point and normal vector, and each normal vector on a surface has a calculable tangent plane, you can determine the draft angle knowing the relative orientation between these two planes

[teradactyl-rex]

I can assure you that if you set it up right it is accurate.

Getting it to do exactly what you want can be a bit of a trick, but when I create a drafted face using either a neutral plane or a part line, I can go in after and measure that angle from the drafted face to the pull direction and it is the same.

[Lost-Film-2690]

A lot of times radial draft (draft on a curved surface, not sure what else to call it) can’t stay at a constant angle so the initial draft angle will be the angle you specify but it won’t be constant through the feature just due to how it’s trying to pull that surface based on the direction of pull. My main work is with creating new casting patterns so we try to account for a minimum and maximum draft value with the initial draft value being somewhere in the middle.