Complete set of mechanical anatomically driven fingers
by robohand, published
To learn more about our project, please go to:
or watch the [video](http://www.youtube.com/watch?v=WT3772yhr0o)
Recent Commentsview all
I'm a senior in high school in an engineering class and i'm going to do this for my senior project. Is there any way I could email you along the way to have you as a mentor to this project? Thanks! -Ariana
There appears to be a mixture of scales for parts in the latest Righthand 2.6 thing file. The proximal_phal and the anth_hand_mount_fixed are at a larger scale than the rest of the parts, so they do not fit.
Thankyou for this project - it is wonderful! I am in the process of making one for my sister. I was wondering though if there is a technical reason for the equal length fingers. I was planning on making the the finger lengths match those of her other hand. If you already tried that, however, and found it leads to some problem so that the hand mechanics stop working, then I would rather know to not go that route. I do understand that I will not be able to just scale the parts, but will have to redo the 3D mesh to change the length. Also, is there any chance you can post a vendor/part number for the threaded brass rod and the the brass cable lock? I have not been able to find those parts.
Liked Byview all
Give a Shout Out
Uploaded New Starting point file for Left and Right hands. Files feature numerous changes including:
-Revised Thumb mounting point, for better printability and reduced clean-up.
-Revised Fingertips so elastic and control string can be attached more simply.
You can download the assembly and parts manual here on Thingiverse "Thing number 64720": thingiverse.com/thing:64720
Both right and left hand files are now available. Due to the large number of individual parts, the easiest way to access the STL files is to extract them from the .thing file using Makerware. To do this, delete everything on the build plate except the part you want to convert back into an STL, then click file "save as". Under the "file type" drop-down menu, select the ASCII STL option.
An updated version of the complete hand file (2.5) and thumb mount (2.5) are now available as of 2/4/13. The new version includes:
-improved function developed after further experimentation with the hand. It also includes improvements to the hand's aesthetics courtesy of Chris from Anthromod.
-an improvement to the cable guide for the thumb mount, as well as the addition of a bungee anchor on the thumb mount.
-The addition of extra mounting holes on the thumb mount
-The inclusion of the cable guide/anchor blocks used on the "Gauntlet"
The device in its current state can be assembled by using 3mm nuts and bolts in the holes provided. The fingers have guide holes in the top and bottom. The holes in the top are for return cables (Robohand used bungees) and the holes in the bottom are for control cables
Notes on printing:
We advise that the thumb mount and hand mount bar/wrist hinge be printed at 100% infill for maximum strength as these parts are subjected to the most mechanical stress. For the rest of the components, our expiriments suggest that 20% infill is sufficient. All of the parts were printed with a layer hight of 0.2mm.
This device was then mounted on a "gauntlet" made from thermoplastic. When the wearer bends their wrist, it causes the cables to be pulled and thus flexes the fingers. we have completed a manual for assembly. This will be available on our blog..
Using Makerware, it could be scaled to fit a wide range of individuals. The only thing that would need to be changed is the size of the bolts purchased from a hardware store. The design is open-source and in the public domain. We encourage anyone who can make use of this design for any purpose to do so :)
The parts shown in the pictures were fabricated using a Replicator 2 that was given to our project by Makerbot. Thank you Makerbot!!!
You must be logged in to post a comment.