Sheetmetal > Designing in Sheetmetal Design > Creating and Modifying Walls > Creating Walls > Helical Swept Walls > To Create a Helical Swept Wall
  
To Create a Helical Swept Wall
1. Click Model > Shapes and then click the arrow next to Sweep.
2. Click Helical Sweep. The Helical Sweep tab opens.
3. For a first wall, type a value for the wall thickness or accept the default value.
4. Select or sketch a helix sweep profile and an axis of revolution. To sketch a helix sweep profile and axis of revolution:
a. Click References. The References tab opens.
b. Click Define. In Sketcher, set references and sketch an open section to define the helix sweep profile. The sketched entities must form an open loop.
c. Sketch a geometry centerline to define the axis of revolution.
 
* The helix sweep profile entities must not have a tangent that is normal to the centerline at any point.
d. To flip the starting point of the sweep trajectory, click Flip.
e. Click .
5. Set the section orientation in relation to the helix sweep profile.
Through axis of revolution—Orients the section to lie on a plane that passes through the axis of revolution.
Normal to trajectory—Orients the section normal to the sweep profile.
 
* If you select Normal to trajectory, the profile entities must be tangent to each other.
6. Sketch a section to sweep:
a. Click to open Sketcher. Set references.
b. Sketch a section at the sweep start point (crosshairs).
c. Click .
 
* In Sketcher, you can change the direction of material thickness and specify thickness for a section containing a single chain with tangent entities. Click Setup > Feature Tools > Thicken to access this tool.
7. Set the pitch (distance between coils).
8. Click to use the right-hand rule or click to use the left-hand rule.
9. For a first wall, set a value for the wall thickness.
10. To set sheetmetal-specific options, click Options. The Options tab opens. Perform any of the following operations:
Click Add bends on sharp edges to round sharp edges when the sketch includes nontangent geometry. Set the value of the radius and the location for dimensioning the radius.
Click Set driving surface opposite swept surface to flip the driving surface. This option is not available for a first wall.
11. To set feature-specific bend allowance and calculate the developed length using a different method from that of the part, perform the following operations:
a. Click Bend Allowance. The Bend Allowance tab opens.
b. Click Use feature settings.
c. Perform one of the following operations:
Click By K factor or By Y factor and type a new factor value or select one from the list.
To use a bend table to calculate developed length for arcs, click By bend table. Use the default table, select a new one from the list, or click Browse to browse to a different table.
 
* Only bend tables copied to the part are available.
12. Click .