Mod Palm Left and Phalanx of Phoenix Hand V2

thingiverse

Well let's start from the beginning : A dedicated team came together under the Brazilian Project Habilis to develop a fully functional low-cost 3D printed myoelectric prosthetic hand, but we were tasked with making an even greater miracle happen before touching our research: helping a young man who had lost most of his left hand in a terrible accident on a dog food factory. However, that was not the end - he became a victim of medical error while in the hospital and his remaining left thumb was placed in a peculiar position, rendering it useless. But what made this achievement a miracle? The deadline was just four days away! So, the biomedical doctor leader asked: "Guys, can you make it happen?" We looked at each other and, after a few seconds of intense discussion about the most daunting challenge we had ever faced, our answer was clear: yes, let's do it! Unfortunately, we didn't have access to any medical exams or X-rays. All we had was the patient and his old aesthetic prosthetic hand that caused many bruises and scars on his skin, with open wounds still present. This gave us a boost of energy to work as fast as possible, but we couldn't create something entirely new in such a short time. Therefore, we decided to make necessary modifications to the Phoenix project developed by the E-Nable team. The initial results were successful, and the new Phoenix design looked comfortable for the patient to use. Unfortunately, during the final assembly, the physiatrist asked us to make some changes to avoid any further harm to the patient's health, which we couldn't accomplish at that time. Here is the result of our incredible journey, which you can print and test or discuss with your teachers and friends in class. Total printing time for parts during those four days: 60 hours Parts printed during the research and final product: 19 Average configuration: Layer height: 0.2 mm Materials: PLA/ABS Premium and Translucent PLA Print hotend temperature: 195°C Print heatbed temperature (PLA): 62°C Print heatbed temperature (ABS): 115°C Printers used: Graber I3 Sethi Aip3 Prusa i3 Graber I3 Bowden mod Contents: All modified files of the Phoenix model Model of the patient's arm All source and STL files from this case are available here. The H1 2016 E-Nable Phoenix Team (listed in non-specific order): Lead 3D Modeler: Guilherme RazGriz Lead Engineer: Thabata Ganga Firmware Printerhost Programmer: Ayrton Cavalieri 3D Printer Operators: Renato, Ayrton, Thabata, RazGriz Print Settings: Printer: Graber I3 Rafts: Yes Supports: Yes Resolution: 0.2mm Infill: 40% Notes: For the palm use raft supports at a density of 4% and print at a speed of 50 mm/s. How I Designed This: First Step: Model the remaining parts of the hand We used MakeHuman to apply the correct measurements of the patient, then exported the mesh and skeleton character settings in Blender. After that, we deleted the lost fingers and set the position as close to reality as possible by using boolean difference first cut. Positioning the arm on the Phoenix mesh made the boolean difference second cut. The hand on Pure State. First Model Attempt. Big Problem Ahead! The ways of the cables pass were clogged!! Clogged Ways!! The second part of our huge modification was spinning the front of the palm to avoid the remaining natural parts of the patient's hand. This was done in one piece using the Sculpt Tool Brush of Blender, but at a cost: we had to manually and meticulously desobstruct the cables passage. The patient asked for the punisher on his new