Slinky Remix

thingiverse

I really appreciated the concept behind Desktop_Makes' Slinky design, but I struggled to get it to print cleanly. One thing that caught my attention is that the internal face of the Slinky turned into a polygon due to the perimeters on the layers just above the gaps between the coils "cutting the corner" because there was nothing for them to adhere to. This observation led me to remix the design, creating an inner wall that corresponds with the layers generated by the slicer. This project was also a fun challenge because I wanted to see how it could be designed in Onshape compared to Fusion 360, and it turned out that it was simpler in Onshape. This design assumes that the slicer is set up for 0.2mm layer height, including the first layer. You can confirm that the layer height is configured correctly by checking to see if the layer edges align with the vertices of the internal polygon as shown in the attached screenshot. I used Slic3r, so it's possible that other slicers won't handle the coil in the same way. The gap between the coils is 0.4 mm, so it took some effort to get them separated once the print was done, but I managed to do it without breaking my new toy.