Palm Harness for Knick's Prosthetic Finger

thingiverse

This is a custom-made palm harness designed to work seamlessly with Knick's Prosthetic Finger. It offers an alternative to the traditional bracelet-based tendon anchor design, providing a more comfortable and secure fit for individuals using two fingers at once. To create this harness, you will need the following materials: * Flexible filament (TPU, eLastic, NinjaFlex, or similar) * Hard filament (PLA, ABS, PETG, or similar) * M2.5 x 3 mm set screw * Buckle for 10mm wide strap The harness and straps are best printed with flexible filament, as this will provide the necessary flexibility and comfort. eSun eLastic was used in the original design, but other filaments like NinjaFlex may also work well. If using a stiffer filament, consider making the straps and harness thinner. This palm harness can be worn on either hand, and it's up to your preference whether you wear it with the smooth surface out or against your skin. Simply use the regular or reversed versions of the harness and palm straps accordingly. You will need two wrist straps, which are over-long and can be trimmed depending on your buckle setup. The length of the palm strap is dependent on your hand size, so measure the distance between the harness ends to determine the correct size. You can resize the palm strap in your printing software or edit it in Sketchup. The anchor block is designed for standard hard filament like PLA, ABS, or PETG. A clear PETG was used in the original design. The block requires an M2.5 x 3 mm set screw, which you may already have from Knick's Finger. For the buckle, you can use a plastic buckle designed for 10mm wide straps, or consider using a watch band buckle as an alternative. To assemble the palm harness: 1. Attach the palm and wrist straps to the harness by melting the ends together. This is easily done with a soldering iron at low temperature. 2. Practice melting scraps before assembling the harness to get a feel for the process. 3. Place the ends of the harness and straps against each other and melt the ridges into the v-grooves. 4. Flip the joint over and melt the flush mating ends together. 5. Attach the buckle to the wrist straps in the same way, or leave them adjustable. Assembly of the anchor block is straightforward. Print settings: * Rafts: No * Supports: No * Resolution: .2mm (though not critical) * Infill: 100%