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F
Figure 1. Extruded rail Figure 2. Attached rail Figure 3. Rail bending method
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Parts for the attachment of the mechanism to the upper and lower arm were constructed using 3d printed PLA and ABS. Foam padding was added to the undersides of the plastic to increase comfort for the wearer. Velcro straps were threaded through holes in the plastic parts for attaching them to the arm. During testing it was found that there was too much movement of the lower piece when the mechanism was used. To correct for this movement and add stability in the mechanism a handle was added to the lower arm piece, shown in Figure 14. The final product is shown in Figure 15.
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