Ball and Socket Joint Based Helping Hands

prusaprinters

<p>I designed a ball and socket joint inspired by <a href="https://www.thingiverse.com/thing:889439">https://www.thingiverse.com/thing:889439</a> to help me with a helping hands project I wanted to create. I took a different approach to the design and added dimple and detent system that allows for many different angles while reinforcing rigidity.</p> <p>The STL file versions included have a 2.5% increased ball vs socket size. This is to maximize surface contact area to increase friction. I use this value with PETG, but you may wish to experiment with lower and higher values to determine what works for you.</p> <p>The grippers should be printed with one of the flat sides on the ball down and with support on build plate only. They can be a little difficult to remove from the supports, so I recommend printing one more than you need. I break about one in ten during support removal.</p> <p>The base can take an arbitrary number of sides, I just set it to 6 to match the hex theme I chose to decrease material used.</p> <p>The render time in OpenSCAD is excessive because of the resolution included. You can probably reduce $fn to 26 or less and get away with it.</p> <p>I tried a number of patterns for the dimpling, and what I have is definitely not the correct way to do them, but I really didn't want to spend another couple days thinking about dimples.</p> <p>Libraries used include the scad-utils library found on github at <a href="https://github.com/openscad/scad-utils">https://github.com/openscad/scad-utils</a></p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>I3 MK3S</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>Yes</p></div> <p><strong>Resolution:</strong></p> <p>0.2</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>15</p></div> <p><strong>Filament:</strong> Prusament PETG Orange</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>Only the gripper needs supports with default settings.</p></div> </p></p></p> Category: Art Tools