Ender 3 Gantry leveling aid

thingiverse

UPDATE: V2 now with feet that are more narrow and chamfered for easier insertion into V-slots. Feet width is also adjustable. The best video for building an Ender 3 can be found at https://www.youtube.com/watch?v=me8Qrwh907Q&t=798s. Tom offers a clever tip for properly leveling the gantry: Use the metal part of the spool holder as a defined spacer on both sides. This solution is easy to implement, but it may not work if you have a dual Z-axis that tends to be slightly off or if your gantry starts to sag due to loose tension or worn-out wheels. Since the spool holder is mounted, what can we use as a well-defined and fitting spacer? I had no suitable parts at home, so I designed and printed my own! Simply print two pieces and place them under the gantry on the 4040 extrusion. Lower the gantry until it rests on both spacers. You can then adjust the eccentric nuts or install the timing belt for your dual Z-axis. Make sure that the spacers fit flush against the 4040 extrusion. I had to file down a bit of the notch on my spacers due to retraction-induced width increase. You can also modify the size in OpenSCAD if needed. As always, I've included the source file. Enjoy and have fun!