This video shows how Marc’s arm works – the model is similar to various organic anatomical models – wire acts in an agonistic-antagonistic pairing – one pulls a finger so it follows its path of least resistance in its articulation and contracts; the opposite wire in the pairing straightens the digit back out.
Each digit has a servo which manipulates the wire ligaments; the wrist also has it’s own servo to allow degrees of freedom to the joint which are approximate to those in a human arm.
Hello everyone,
have you ever tried to use NiTi-wires instead of server-motors ?
Have a look:
http://www.jameco.com/webapp/wcs/stores/servlet/StoreCatalogDrillDownView?langId=-1&storeId=10001&catalogId=10001&freeText=niti&search_type=jamecoall
I have some “tension springs” in experience which can pull up to 3 kg !
For faster cooling you should install a little fan.
Kind regards from Germany
Christian