How to Use a Sweep in SOLIDWORKS
Contents
A sweep creates a feature by moving a profile along a path. In SOLIDWORKS, sweeps are used for tubes, wires, handles, slots, grooves, springs, pipes, and shapes that follow a curve instead of a straight extrusion.
Create the path
Start with the path the sweep will follow. The path can be a sketch, 3D sketch, model edge, curve, or helix. Make sure the path is smooth enough for the profile to travel along it without twisting or intersecting itself.
Fully define the path whenever possible. A small under-defined path change can move the sweep through nearby geometry and cause a feature that worked yesterday to fail after the next rebuild.
Create the profile
Create a separate sketch for the sweep profile. The profile is usually placed at the start of the path and should be related to the path with a Pierce relation when needed. A circle, rectangle, slot, or custom closed profile can all be used.
The profile does not have to be complicated. Many reliable sweeps use a simple circle or rectangle. If the shape needs detail, keep the profile constrained and avoid tiny edges that make the sweep harder to solve.
Run the swept boss or cut
- Go to Features > Swept Boss/Base or Swept Cut.
- Select the profile sketch.
- Select the path.
- Review the preview.
- Adjust options such as orientation, twist, or guide curves if needed.
- Accept the feature.
Use guide curves when the shape needs control
Guide curves help control how the swept shape changes along the path. They are helpful for organic shapes, handles, ducts, and transitions that cannot be controlled by one profile and one path alone.
When using guide curves, make sure the profile touches or is related to the guide curves as required. Missing relations are a common reason a guided sweep previews incorrectly or refuses to build.
Troubleshooting sweep failures
If the sweep fails, check whether the profile is too large for the bends in the path. The profile may be intersecting itself as it moves. Reduce the profile size, simplify the path, add a Pierce relation, or adjust the orientation settings.
Also check the start point. If SOLIDWORKS chooses the wrong end of the path, edit the selections and confirm that the profile is attached to the intended path start.
