Spine dragchain - improvements

thingiverse

This is an alternate version of Maxdarkdog's Spine dragchain. I was inspired by the design and decided to print some modifications as an experiment. After printing, I had some suggestions and instead of asking for them to be implemented, I chose to make the changes myself, test clearances, and such. I had to recreate the files in FreeCAD for easy editing so you also get the source as well. The changes I made and why (from right to left): 1) A chamfer at the bottom edge - No elephant's foot and a clean, straight contact surface. 2) Cutting the round surface - No sharp bottom side, no overhang at the top. 3) Slanted surfaces of the inside where clips reside - No bridging while printing. 4 Top) A chamfer at the inner edge for less friction from the sharp edge. 4 Bottom) The bottom part of the cylindrical part starts at 45 degrees - No overhangs. 5) A lip at one end of the smallest clip - Easy opening. 6) Chamfers on inside edges of the clip - Less chafing on cables. The parts are compatible and interchangeable with the original design. If you want longer clips, simply change the ClipV1.Pad.Sketch.Constraint35 (which is 3mm) to your desired length and export an STL. I printed mine in PETG and since they bend quite a lot while assembling, I am not sure if PLA will work. E1: Added one-sided clip. E2: Added a bed connection to suit my printer. Use two regular clips (not one-sided) to hold wires to it. Thought to make a thread in the bed hole but at the end it is held by a single ziptie through the hole. PETG holds well at 80C. Please post your comments, makes,... :)