... you can create a csys within a sketch?!? You really do learn something every day! What else is that useful for?
Thanks guys, it needed both of those in the end (csys and extending the surface - adding the csys worked initially, then after I increased the number of coils it failed and still didn't work when I set it back to one!).
Also, the csys thing isn't mentioned in the top layer of help for Wrap... but I guess that's standard for Pro/E.
(OK, it's mentioned in About the Wrap Feature.)
1. | Select the sketched datum curve to wrap onto geometry. |
| 2. | Click EditWrap. The Wrap dashboard appears. A preview shows the sketched curve wrapped on the first geometry that the Wrap tool finds in the default wrapping direction. |
| 3. | To select different geometry, click the collector next to on the dashboard, and then select the geometry to wrap in the graphics window. You can also select geometry using the Destination collector on the References panel. |
| 4. | To select the wrap origin, click the collector next to on the dashboard, and then use the down arrow to select the origin from the list. |
| 5. | If you wrap a disconnected sketch onto a multi-contour surface, and want to prevent the sketch from wrapping onto intersecting surfaces, select the Ignore intersection surface check box. |
| 6. | If you want to trim at the surface boundary the portion of the curve that cannot be wrapped, select the Trim at boundary check box. |
| 7. | Click . The sketched curve is wrapped on the geometry that you selected. |