Helix
Command creates 2D spiral or 3D spring. Helix is used to create springs, carvings, rounded stairs.
Ribbon: Home, Draw – Draw > 
Helix
Menu: Draw – Helix
Command line: HELIX
Options:
| Base radius | Radius of helix base. |
|---|---|
| Top radius | Radius of helix top. |
| Axis endpoint | Endpoint location of the helix axis. The axis endpoint can be located anywhere in 3D space. The axis endpoint defines helix length and orientation. |
| Turns | Number of turns for helix. |
| Turn height | Height of one complete turn within the helix. The number of turns will automatically update accordingly when a turn height value is specified. If the number of turns for the helix has been specified, you cannot enter a value for the turn height. |
| Twist | Direction of helix twist: clockwise (CW) or counterclockwise (CCW). CCW is default twist. |
Command prompts:
| Specify center point of base: | Specify center (1) point. |
|---|---|
| Specify base radius or [Diameter]: | Specify base radius (2). Click Diameter to specify base diameter. |
| Specify top radius or [Diameter]: | Specify top radius. Click Diameter to specify top diameter. |
| Specify helix height or [Axis_endpoint/Turns/turn_Height/tWist] | Specify the height of helix (4). |
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