Why won’t my bent part preview in 3D?

When you upload your bent files for quoting, you’ll be able to view a model of it in 3D to check the angles and flange orientations. You can click the 3D/2D toggle to switch between previews. When configuring bends, the 3D preview should show by default.

However, if your design is not previewing correctly in 3D, there could be a couple of reasons:

1. Your design needs bend reliefs

Bend reliefs can help prevent bulging in the corners of your part and is required for a successful bend in some cases. Check out our blog post on designing bend reliefs to learn when to use bend reliefs and how to create them.

2. The bend line doesn’t extend the full width of the part

It’s important that the bend line you include in your design extends the full width of the part because it will otherwise be ignored by our automated processing. Our Guide to Configuring Bends In Our App can show you how to properly include bend lines in your design.

3. The file is not set up correctly

There are a few factors that play into a file not being set up correctly for bending. 

Common Bend File Issues

• Incorrect bend line indicator
  • for example, the ‘Hidden’ line style is selected in a DXF exported from SolidWorks or AutoCAD
    • see our tutorial for how to avoid this in SolidWorks: How To Map Bend Lines into Layers and Linetypes in SolidWorks

• Incomplete geometry (broken contours / disconnected paths)

• Incorrect file type (for example, uploading a non-.ai file from Adobe Illustrator)
  • FAQ: What file formats do you accept?

• STEP/STP format file contains a part that does not meet our guidelines
  • See our STEP/STP file setup criteria

Software	Format	Bend line
Adobe Illustrator	.ai	Solid, separate color from cut lines
AutoCAD	.dxf, .step, .stp	Dashed line (not hidden)
CorelDraw	.eps	Solid, separate color from cut lines
Fusion	.dxf, .step, .stp	Solid line (default)*
Inkscape	.eps	Solid, separate color from cut lines
SolidWorks	.dxf, .step, .stp	Dashed line (not hidden)

*Follow our Fusion 360 bend file export guide here: Exporting to DXF from Fusion 360

Fixing Your Adobe Illustrator File

The most common issue we see with Illustrator files happens when paths in the file are disconnected and do not make a compound shape. To fix this, check out our tutorial on Setting Up Your File for Bending in Adobe Illustrator.

Please note: if you’ll be uploading a STEP/STP format file, you don’t need to worry about bend lines. Just make sure your part design meets our 3D File Guidelines and model your bent flanges before uploading your file to our website. The flanges and their definitions should be detected. Then, check the bends at the Add Services step of the instant quote process to make sure the definitions are correct and that bending services are successfully added to the part.

For more info on designing for plastic and sheet metal bending, see our blog for tutorials and tips! If this guide doesn’t help resolve trouble viewing your parts in 3D please reach out to our Support team.

In Summary