#  Step 1b: Create Fibers 

 



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  expand\_more  

 
  

 

#### Create fibers

Sort   ![17_fibers1.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__360x360_scale/public/sorotoolkit/files/17_fibers1.png?itok=_sQp1aKU) 

 



The second major component of the actuator is the set of fibers around the outside. To create these fibers, double click on **Part** again. Name the part ‘fibers’ and make it a 3d Point. Hit enter to accept the default of (0.0,0.0,0.0) as the coordinates.





Sort   ![18_fibers2.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__360x360_scale/public/sorotoolkit/files/18_fibers2.png?itok=p0Fmxm_n) 

 



Go to **File->Run Script**. Browse to the file fibers.py and run it. This file creates a helical wire structure, with radius 8.35mm, height 163mm, and fiber angle 3°. An actuator with this fiber angle will extend and twist upon pressurization.

Note: the fiber angle can be changed by modifying the parameter ALPHA in fibers.py.

*For a bending actuator, run the file fibers\_bending.py. This will create a symmetric arrangement of fibers (fibers at equal and opposite angles).*







Sort   ![19_apply_iso_view_with_circle.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__360x360_scale/public/sorotoolkit/files/19_apply_iso_view_with_circle.png?itok=an-Wx9gU) 

 



To view the fibers, click on **Apply Iso View**.





   ![20_view_fibers_cropped.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/sorotoolkit/files/20_view_fibers_cropped.png?itok=WiuVjfzK) 

 

#### Add fibers to assembly

Now we will make a set containing the fibers, as we will use this later in the model. In the model tree, expand **Parts**->**Fibers** and double click on **Sets**.

Sort   ![21_fibers4.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__360x360_scale/public/sorotoolkit/files/21_fibers4.png?itok=mPWBK6VV) 

 



Name the set FiberSet and click **Continue**. 





Click on the fibers to select them as the geometry for the set, and click **Done**.

   ![22_select_fibers_crop.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/sorotoolkit/files/22_select_fibers_crop.png?itok=5NTj5p5s) 

 

To add an instance of the fiber to the assembly, expand the assembly tree, double click on **Instances**, select ‘fibers’ in the **Create Instance** box, and click **OK**.

   ![25_fibers6.png](/sites/g/files/omnuum4601/files/styles/hwp_1_1__720x720_scale/public/sorotoolkit/files/25_fibers6.png?itok=Tp4gNKzB)