CONVERTING A 3D EDGE TO A 3D SKECTH??

Nicholas

I'm working on a model that requires quite a lot of surfacing. I used the split face on a surface  to generate a 3D edge, I want to convert it into a 3d sketch that I can use to create another surface. How do I go about it? 

MichaelPascoe

This shape is possible, however Onshape doesn't offer 3D sketching. Follow the Advanced Surfacing - Learning Pathway. This should teach you all the things you need to know to be able to do surfacing like this. Here are a few things you may need to be able to use:

• Project curve
• Freeform Spline by @Evan_Reese (Similar to a 3D sketch)
• Loft
• Sweep
• Bridging curve
• Fit spline
• Curvature and surface analysis tools to make sure you have smooth transitions

MichaelPascoe

This shape is possible, however Onshape doesn't offer 3D sketching. Follow the Advanced Surfacing - Learning Pathway. This should teach you all the things you need to know to be able to do surfacing like this. Here are a few things you may need to be able to use:

• Project curve
• Freeform Spline by @Evan_Reese (Similar to a 3D sketch)
• Loft
• Sweep
• Bridging curve
• Fit spline
• Curvature and surface analysis tools to make sure you have smooth transitions

GregBrown

The surface modeling toolset (that Michael partially listed above) does not require a "3D sketch" - you can do all your lofts, sweeps, ruled surfaces, boundary surfaces etc etc with (for example) edges created in a split feature, or curves you create from a bridging curve, or a fit spline, or even regular sketch entities.

So to answer your first question, you don't need to do anything with the edges you already have created, just use them... 

The real question (and solution!) will be in the process/workflow you use. Using split edges as the basis of downstream surfaces can be suboptimal. Make sure to check the quality of those split edges (curvature combs, control points, edge-face tangency, curvature deviation...) before wondering why there are so many control points on the loft you created