Curves created between two points

Can anyone explain to me why curves created between two points using the "thru points" option are not accepted as trajectory during sweep feature creation? How can I get around this?

Answer 01

These curves will be accepted if you use the single-radius or multiple-radius options. Splines, which are the default curve types for thru points, cannot be used as trajectories for a sweep.

Answer 01

Assuming you are using Wildfire, use the variable section sweep.

Answer 01

You can overcome this problem by using variable section sweep or swept blend.

Answer 01

When curves between two points are created, often the end points of those curves are unable to be perpendicular to the curve trajectory. There are two ways to overcome this problem. After selecting the curve use the trim/extend command and extend the endpoints for a specified distance. This allows for endpoint alignment to a sketch plane because the extension is straight. The drawback to this method is that only a single loop can be used for the sweep.

A second method is creating either a 2 projection curve for complex three-dimensional trajectories or a sketched curves. In Sketcher, select the points you would like to go through as you sketch references for placement. You will need a straight section for your start point, so the sketch plane can be created perpendicular to the trajectory. These two-curve creation methods are more powerful in that they will accept multiple-loop sketches and are less likely to fail.

Answer 01

When you create datum curve thru points and use them for sweep, Pro/E is not able to find adjacent reference surfaces to determine the surface to which your section will be normal. Use advanced option, selecting Feature >Create >Protrusion >Advanced >Swept Blend. After selecting the datum curve as the trajectory, Pro/E will ask you for a surface to which your section will be normal. Show it that surface and you will accomplish your task.

Answer 01

The reason you could not select the two-points curve as your sweep trajectory is that you did not sufficiently define the orientation of the curve. Go back and redefine the former two-points curve with its orientations and you will be able to create your sweep with a two-points curve.