Devices with Bowden Dual-Actuation

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PeterBinkley
Posts: 46
Joined: Fri Feb 13, 2015 5:49 pm

Devices with Bowden Dual-Actuation

Postby PeterBinkley » Sun Aug 07, 2016 6:20 pm

Please share ideas and source hardware here for Bowden dual-actuation. BDA refers to a mechanism that uses a type of cabling that resists linear compression. Heavy-gauge nylon monofilament seems to currently be the preferred material. The cabling is routed in such a way that it causes joints to actuate in one direction when pulled, and the opposite direction when pushed.

PeterBinkley
Posts: 46
Joined: Fri Feb 13, 2015 5:49 pm

Re: Devices with Bowden Dual-Actuation

Postby PeterBinkley » Sun Aug 07, 2016 6:32 pm

The Osprey Hand uses BDA. http://www.thingiverse.com/thing:910465
Here's the assembly manual. The bill of materials is sourced for North America. https://docs.google.com/document/d/1xbfhPYKO-4hcpnAmYpvGPY-vzPpO1QTiwvFZkcN3034/edit?usp=sharing
In this case, the nylon monofilament in the instructions is fishing line. Note that the minimum thickness for a 100% build is 1.2mm, and for a 160% hand it would be about 2.0mm. There may be other sources for nylon mono (such as nylon 3d printer filament and weed eater trimmer line)


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