The following materials are the only supplies needed to create the manual gripper:
- A hollow tube (cardboard or plastic)
- Crafts string
- and zip ties (2)
- Download the detailed bill of material here.
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To create different grippers to test, the following variables can be altered:
- Number of fingers
- Orientation of fingers towards each other
- Distance between the fingers (depending on availability of tubes of different diameter)
To assemble, place the laced fingers on either side of the hollow tube as shown, if using three or more fingers, you may need to pretension the zip ties before wiggling in a third and fourth finger inside the zip ties. Situate the fingers so that the natural position of the fingers is slightly angled outward, by pulling the bottom of the finger down slightly until the last segment intersects with the handle, as shown. Using the two cable ties to secure the fingers, pull taught and cut the excess zip ties.
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Your gripper is ready!
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