3D Systems CubePro Manual page 20

Printing A Large Flat Radius Feature
Parts with large radius features need more supports than flat angles. Because of nylon
printing properties, it requires more support than PLA and ABS. If not properly supported,
the nozzle can break if the print begins to curl and warp.
Use the Advanced menu in the Build Settings utility to set the Support Angle to 75˚ or the
appropriate angle for supporting your part.
Verify the part in the software after it has been built to confirm that the support angle is
correct.