KISS CoreXY 3D Printer

thingiverse

*** THIS IS A WORK IN PROGRESS - THIS IS NOT A COMPLETE WORKING DESIGN *** The last thing we need is another 3D printer. Sorry. My goal is to Keep It Simple, Stupid (KISS). As many printed parts as possible. Easy to source. Cheap. One major departure from other printer is the belted Z. I just hate lead screws. One issue with a belted Z is that the bed tends to crash when motors lose power. I fixed that by using a worm gear I bought on AliExpress. I believe 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, KISS. I decided to go with 3 wheeled carriages because they are easy to adjust. My experience with lm8uu and bushings in general has been "interesting" so I decided not to use any and go with wheeled carriages exclusively. The bed is supported by carriages on all 4 corners. Obviously 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 the STL of the latest versions of each part . I've also included the 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 the Y and Z endstops as well as a 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.