Still working on the final details of this thing. The wrist brace needs some tweaking as well as some of the binding posts. All in all the WREX arm does print and function. Binding posts can be replaced with shoulder bolts if desired. Also, The holes should be sized for #10 socket head cap screws. If you scale anything up or down you will need to adjust your screws accordingly. I will update these files as I can. Assembly instructions will be included in the future as well.
The Wilmington Robotic EXoskeleton (WREX) Arm is a robotic orthosis designed by Jaeco Orthotics. The original design allows for four degrees of biomechanical motion and uses elastic bands to resist the pull of gravity on the users arm. Two sets of bands independently support the forearm and upper arm. The device was design for individuals with neuromuscular disorders to functionally support daily living tasks such as feeding and writing. More information on the WREX can be found here:
The original design was cumbersome and made of mostly metal parts. Scientists from the Nemours/Alfred I. duPont Hospital for Children created a 3d printed version for children that is lightweight, easily adjustable, and much more cost effective (The original WREX sells for app. $2400). More information of the "Magic Arms" can be found at here:
We were able to find STL files for the WREX Arm and printed an early model of the 3d printed WREX. The design was fragile and difficult to scale without the source files. This is our version of the WREX. The connectors are customizeable in length to fit all different sizes. This model is designed to be attached to a child's chest brace via the back mount. The left elbow hinges are not my design. They belong to the original design team. As of now, I do not have a version available for the right arm.