KISS CoreXY 3D Printer

thingiverse

THIS IS A WORK IN PROGRESS - THIS IS NOT A COMPLETE WORKING DESIGN The last thing I need is another 3D printer, sorry. My goal is to keep it simple, stupid (KISS). As many printed parts as possible are easy to source and cheap. One major departure from other printers is the belted Z-axis. I just hate lead screws. One issue with a belted Z-axis is that the bed tends to crash when motors lose power. I fixed this by using a worm gear bought on AliExpress. The weight of the bed will prevent any backlash. I'm using a 500mm long 5mm rod so I can use a single motor again, keeping it simple. I decided to go with three-wheeled carriages because they are easy to adjust. My experience with LM8UU and bushings has been "interesting," so I decided not to use any and go with wheeled carriages exclusively. The bed is supported by carriages on all four corners. You will need a bunch of wheels, 21 to be exact. I paid less than $30 for all of them on AliExpress/Tevo, and they were all fine. All the extrusions except one are the same size (500mm). The biggest bed you can fit with a 500mm cube is probably 300x350mm, and the Z print height is probably around 350mm. I've included STL files of the latest versions of each part. I've also included Fusion 360 files if you want to customize them, which you probably will have to do. I don't have a formal BOM yet. 8 Jan 2018 I added a generic mount for Y and Z endstops as well as an X endstop mount for the X carriage with a little trigger that can be inserted in the XY Joiner's nut hole to trigger the endstop.