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Repairing Split Mesh with High Curvature

Message 1 of 3
349 Views, 2 Replies

Repairing Split Mesh with High Curvature

I have obtained a 3D laser scanned .stl mesh file for a propeller I would like to model. The upper and lower surfaces of the prop were scanned very nicely, however the leading and trailing edges are completely absent from the scan. Thus, I have a single mesh which is essentially split into two surfaces except where the blade root attaches to the hub. I need to join these surfaces together. The fill holes command, and sculpt tools have failed so far. I also tried converting the mesh to a solid, which totally ruined the geometry. Is this a lost cause? Should I do another scan? 


The blade is about 8 inches in diameter and wing thickness is on the order of a few millimeters at most. 

Message 2 of 3
in reply to: abutkus

Some image would help to give decent advice.


If there are two non intersecting, non solid surfaces (with a gab between) to weld there are two open boundaries. You might try SELECT/Edit/Join. This needs a selection where the selections includes two open boundaries to join.


As an alternative you might use SELECT/Edit/Bridge to  define a connection between the two boundaries. This way you'll get a single hole. ANALYSIS/Inspector will close that hole.


@ Join see: Join at Helpdesk

@Bridge see: Bridge at Helpdesk 


Basically MakeSolid results depend much the set SolidAccuracy and MeshDensity. But if there are gaps higher parameters will not be  that much of a help....

Gunter Weber
Triangle Artisan

Message 3 of 3
in reply to: MagWeb

I would upload the file directly but it is way too large to post here. Anyway, I did find a workaround. Basically, I took cross sectional slices of the mesh using "Create Mesh Section". I did this in intervals along the wing depending on the curvature of the blade. Following this, for each section I fit a closed spline to the cross section. I then linked these cross sections together with another spline on the leading and trailing edge of the wing. Finally, I create a loft using the cross sections as templates with the leading and trailing edge splines as guide rails. I might post a quick tutorial as this method worked really well and did not take much time. 

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