Cst ltrack clickspring

thingiverse

This approach is a bit rough around the edges when it comes to creating a clicky scroll wheel for a CST L-trak trackball. The spring might be too tight or not tight enough, so I suggest heating it with a lighter to bend it into shape. With 20 increments, this should work just fine; all you need to do is hammer some nails into the holes and cut off their heads to mount the scrollbar, then stick the spring into the Lego cross-hole at the bottom. Edit: It looks like I made a mistake counting those increments - each click generates two scroll events, so it should probably be around 40. I'll make a new one with better measurements soon. Edit2: After some experimentation, it seems that a more suitable number of scroll events for a full rotation is actually 48. A new STL will follow shortly.