Helical/Spiral Prism

Pattern 1 (Helix)

1.  On the [Model] tab, go to and click ▼ at the bottom of [Solid Body] . Select [Helical/Spiral Prism] on the submenu.
   
    

2. Click and set the center-axis point on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
    

3. Enter the radius of cross section in the parameter input dialog box , and click .
    

4. Enter the number of corners of cross section in the parameter input dialog box, and click .
   
   

• If Flatten Sides is selected, the side of helical/spiral prism is made flat face.
  Select it if the mesh creation fails with the curved face.
   

5. Click the position to set the startpoint on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
    

6. Enter the helical pitch in the parameter input dialog box, and click .
    

7. Enter the spiral pitch (0 in this case)in the parameter input dialog box, and click .
    

8. Enter the number of turns in the parameter input dialog box, and click .
   
    

9. Right click to exit.
   
   
   
    

Pattern 2 (spiral)

1.  On the [Model] tab, go to and click ▼ at the bottom of [Solid Body] . Select [Helical/Spiral Prism] on the submenu.
   
    

2. Click and set the center-axis point on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
    

3.  Enter the radius of cross section in the parameter input dialog box , and click .
    

4. Enter the number of corners of cross section in the parameter input dialog box, and click .
   
   

• If Flatten Sides is selected, the side of helical/spiral prism is made flat face.
  Select it if the mesh creation fails with the curved face.
   

5. Click the position to set the startpoint on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
    

6. Enter the helical pitch: 0 in the parameter input dialog box, and click .
    

7. Enter the spiral pitch in the parameter input dialog box, and click .
    

8. Enter the number of turns in the parameter input dialog box, and click .
   
    

9. Right click to exit.
   
    

Pattern 3 (Spiral 2)

1.  On the [Model] tab , click ▼ at the bottom of [Solid Body] . Select [Helical/Spiral Prism] on the submenu.
   
    

2. Click and set the center-axis point on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
   
    

3. Enter the radius of cross section in the parameter input dialog box , and click .
    

4. Enter the number of corners of cross section in the parameter input dialog box, and click .
   
   

• If Flatten Sides is selected, the side of helical/spiral prism is made flat face.
  Select it if the mesh creation fails with the curved face.
   

5. Click the position to set the startpoint on the modeling window.
   
   (Alternatively enter the coordinates in the parameter input dialog box, and click .)
    

6. Enter the helical pitch in the parameter input dialog box, and click .
    

7. Enter the spiral pitch in the parameter input dialog box, and click .
    

8. Enter the number of turns in the parameter input dialog box, and click .
   
    

9. Right click to exit.

Flattening Sides

The side of helical/spiral prism is always curved face.

Mesh creation sometimes fails due to the curved face of the helical/spiral prism.
In such case, by selecting [Flatten Sides],

the failure might be avoided.

Please note, however, that by selecting [Flatten Sides],

face topologies will increase and might incur the following problems.

• Face topology ID of the helical/spiral prism is changed and the boundary condition may not be applied correctly.
  

• Face topology ID of the helical/spiral prism is changed and modification operation given to the face topology fails.

[Flatten Sides] deselected [Flatten Sides] selected