Primitives
Arc3D and Arc3DS
Arc3D creates a constant-diameter 3D bend; Arc3DS creates a segmented/tapering bend with two diameters. Both use a stable Designer bend convention and are aligned explicitly during Plant 3D™ export.
- Where to find it
- Home > Primitives > Arc3D / Arc3DS
- When to use it
- Elbows, curved centerline solids and tapered curved transitions
On this page
Step by step
- Choose Arc3D for a constant-diameter bend or Arc3DS for a two-diameter/segmented bend.
- Set diameter(s), bend radius and sweep angle.
- For Arc3DS, set segment count as required.
- Place and orient the bend before connecting other geometry.
Arc3D values
Arc3D uses diameter D, bend radius R and angle A.
Arc3DS values
Arc3DS uses D1, D2, bend radius RR, angle AA and segment count S.
Export alignment
Plant 3D™'s native arc base convention differs from Designer. Export aligns the native primitive by its actual connection points instead of relying on an empirical offset.
Keep in mind
- Large sweep angles may be exported as multiple smaller native arc pieces for stable Plant 3D™ geometry.
Documentation reviewed