Customizable spool holder for ender 3 (+-pro)

thingiverse

This spool holder lets you use the included plastic nut that came with my ender 3 pro. You can use it to get the diameter you want, so that it fits better for your spools. I am aware of some spools that are only 20 in diameter, and this should be perfect for them. I think the ender 3 has the same system, as well as.. probably most creality printers.. But I don't know for sure. This part is a bit more simple than the included one that has a slight slope to make it easier to tighten the nut. This one is just hopefully tight enough and we'll rely on plastic being soft to keep it tight. I tested with PLA, maybe with PETG the deeply buried variable bottom_h will need to be a little less and topside_h more by the same amount. But it might also just work. If you have a very narrow spool I would recommend turning off savings in order to get a more solid part. See the 20x60 file. As for printing I recommend flipping the part by 90 degrees along the Y axis and making sure you have enough supports to keep the bed adhesion good. This direction you need minimal supports, and it makes a mechanically superior part since it no longer will rely on the layer adhesion to be strong. I think 0.2mm layers will work fine, 0.3 layers works but maybe 0.3 with variable layer size will be the fastest and the best. You can print only the mounting part to check if it is going to work, before printing the whole thing. See extender-demo.stl. Let me know if it will fit with other printers than ender 3, and I'll make a list!