Comparison of compliant joints
Description
In one of my projects (https://www.thingiverse.com/thing:4982561) I am trying to print a fractal inspired gripper finger. So far the results are not satisfactory, so I designed this test strip to find a better design for its joints. You can use it to compare different compliant joints. The two flaps at the ends of the test strip are there to make it easier to hold. It's not perfect but it does the job. Edit: My results starting from the top left (as seen in the screenshot), first row: 1. the joint tilts, but deforms plastically relatively quickly. however, there is a predictable rotational movement. 2. very stiff and not recommended, deforms in the middle and then kinks on one side. 3. my 3d printer has a 0.4 mm nozzle, which seems to have been too wide for this joint. it is all glued together so i can't say anything useful. 4. the joint tilts well and springs back again, the rotational movement is somewhat predictable. my favourite. i will improve it by arranging the X in the joint not in two parts but in four parts. second row: 1. the joint tilts well, however, the movement is not easily predictable and it is very easy to cause a plastic deformation. only conditionally recommended. bonus: through this construction not only a tilting but also a cushioning can be achieved. 2. the most rigid joint. i have the feeling that an immediate plastic deformation occurs. 3. somewhat more flexible than 2. but still relatively stiff, you have to be careful that no plastic deformation occurs. 4. the easiest joint in the whole experiment, yet surprisingly flexible. not quite as elastic as number 4 from the first row though.
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