This is a remix of the phalanxes from the original Kwawu 2.0 upgraded arm. I created this modification so the user did not have to have the elbow flexed to hold an object. This arm is not "strung" and does not use any of the latch pin parts.

The user can hold a drink or spoon, or broom or fly swatter (you get the picture) no matter what angle the arm is at. We call it the "Utility Arm".

To use these STL files remove the "Flexed" part of the names and drop them into your Kwawu 2.0 Files folder AFTER removing the default phalanxes. These were made in Fusion 360 from the original files so their scale and OpenSCAD characteristics are identical and will scale properly.

The original Kwawu arm uses hinges made from shore hardness 82-85 TPU. Make the Utility Arm hinges from shore hardness 95 TPU for maximum grip. Set "GripLatch" to no and do not print the latchpin, latchteeth, latchslider, tensioner or whipple tree parts, you will not be using them since this arm is not strung, the fingers are always flexed tightly.

When printing fingers and phalanxes I believe that CURA's "experimental" Tree Support (branch angle 40, branch distance 4, branch diameter 2) does the best job for supporting these complex geometries.

I use PETG because it prints as easily as PLA and has almost as good temperature resistance as ABS without the smell. You can use whatever you like.

RepRap

RepRap Kossel

No

Yes

.2mm

35-40%