Rotating rings keychain

thingiverse

This is a customizable keychain with rings. Create a fancy business card for yourself or someone you want to impress. Or simply think of it as replacement for some ugly keyrings you always wanted to replace. __WARNING: The Customizer here at thingiverse does not work with this file at the time of writing__. See below for a workaround, i.e. install OpenSCAD on your own computer. That being said, it seems that some folks managed to get it working. The uploaded STL files are just examples. By modifying default parameters or by writing custom function calls in OpenSCAD you can create your own custom made keychain or Christmas present. See below for technical details. Unfortunately there is a problem with the customizer at thingverse. You may have to install OpenSCAD on your own machine and either modify the OpenSCAD code or use the local customizer. You can change many parameters (too many maybe), e.g. * radius * height * number of segments (rings) * spacing between rings * lettering on each ring * font family * font height * type of eyelet *Update V5*: Added debugging features to inspect inner rings and the first ring and made some small changes. This version looks fairly OK to me, but certainly can be improved. I did print several keychains and all of them were usable (turn and do not fall apart). *Update V6 to V8*: Small improvements and adjustments __Inspecting your model:__ * To see if a text fits on an inner ring look at the output in the console. There will be a red warning if we think it to be too big (but it's only an estimation). * skipRings = N; (aka skip_rings = N) allows to skip rings so you can look at inner rings one by one * firstRingOnly = true; (aka first_ring_only = true) will only print the first ring. __If you want a smooth experience:__ * Use a low OpenSCAD resolution, e.g. $fa=1 for the circles, text can be much less. Set circle_resolution=1. However if you don't want to wait, a low poly resolution also can do. * Number of rings means number of equal segments, but if the inner ones are too small they will not be generated. * Make sure that the rings include some curvature, else the thing falls apart. E.g. set height to 10 if radius = 20. * You can skip generating the second ring for debugging embedding of the eyelet and text * There are 2 types of eyelets. Default is the easier to print "square". Type "round" (default=false) is prettier, in principle. __if you want a tight experience__: Models with rings that are difficult to remove (not loose) at least a radio of height/radius = 1/2, i.e. the width should be __max.__ 4 times as wide as the height. Ideally, height should be 60% or radius or greater. In addition, use a low print resolution (0.15mm) and reduce spacing. Make sure that the filling does not disturb the walls, e.g. play with number of shells and filling type. Finally, rather use glue for adherence than "squashed" first layers, else you won' t be able to dissociate the rings. __Updates__: Added an update of the scad file on April 10 2019, but did not have time to change the documentation. In short, the new version can do a bit more, e.g. define a font size for each ring. Also, for people who do not understand arrays, one can define a simple string that will just be printed on the outside...