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Robotic Hand EPS 2018 mechanic bionic robot

by luc_riaud May 24, 2018
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Hello. First of all thanks for the design. I have built all the parts but I am missing one detail.

This is my understanding of the operation of the cords within the fingers. The non elastic cord is connected to the servos, then runs up the palm side of the fingers to up at the top of the fingers. When the servo turn it pulls the finger top causing the finger to curl. The elastic cord runs down the back of the fingers, so when the servo turns back the elastic cord pulls the finger straight again.
When I assemble the hand, I have the fingers straight because of the elastic chord. But if I hold the hand palm down then all the fingers fold down (still straight) at the joint of the palm, as nothing is pulling them back up straight. Where is the elastic cord tied off?

You show a picture with the palm facing up, showing the cord on the inside of the fingers. Can you please add another photo showing the back of hand.


Salut j'ai imprimer tout les pièces et tout fonctionne bien, mais est ce que vous pourriez m'envoyer des photos un peut plus détailler des branchements à faire dans l'arduino, la breadboard et les servo moteur. Vous pouvez me l'envoyer sur mon adresse gmail (acoupal@csm.qc.ca) merci !

hello ! je n'ai pas les shéma de branchement mais dans le programme arduino tu trouvera les numéro de pin pour brancher tes servos ;) tu peu regarder des tuto sur le fonctionnement ds servos moteur :)

Hello, i print your projet successfully but i have a problem i try to mount the fingers but i don't now how you are mount it . can you explain it to me. excuse me for my very bad english i speak french better .thanks

Salut codrux ! pour le montage tu utilise les pins fendu que tu insert entre chaque phalange ainsi que sur la paumes ! peut tu m'envoyer des photo de ton impression ? (luc.riaud@gmail.com) merci d'avance ! si tu n'arrive pas a les monter écrit moi sur mon mail !

Hello Luc_riaud,
What size screws did you use to assemble the parts of the hand?

fingers are assembled with plastic pins directly printable from STL files ! the servos are fixed to the palm with the standard screws usualy supplied with 9g servos ! the pulleys are also fixed with the same screws :)

Hello Dear Is there a right side

nope but you can apply a mirror function to get a right side ;)

hey its awesome design can you tell me how to assemble this?? i really wan to make this....

assemble it with the pins thaht are printable (STL downloadable) :) to fix the servos you just have to use the screws usualy supplied with standard 9g servos !

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