This is a mod for the Creality3D Ender 4 to convert it from a H-Bot configuration to a CoreXY one.
To see the details of the modifications, consult the "Creality Ender 4 - CoreXY Modification" pdf file. You will need some hardware for the mod. The list is in the pdf file but in short :
- 4 meters of 6mm GT2 belt (each belt is approximately 154 cm long)
- 6 x GT2 20 tooth idler pulleys with 5mm internal diameter
- 4 x M5 T-Nuts for 2020 aluminum profiles
- 8 x M5x30 Cap head hex socket screws (DIN 912)
- 2 x M5 nuts
- 2 x M4x30 Cap head hex socket screws (DIN 912)
- 4 x Spade Crimp connectors 6.3 mm wide
I have been printing with this configuration for more than 100 hours and it seems to work fine and, as expected, allows to get rid of the H-Bot issues. Accuracy is improved and circles are circular...
Should you want to tweak the mod, here are the CAD files :
You can download the gcode for the sample prints in the file section. Note that the nozzle used for the prints is not the stock one, I have installed an E3D 0.4mm nozzle (just the nozzle)
If you download this mod now, consider yourself as a beta tester. Something may be missing in the instructions or wrong with the mod. Contribute to improve both through the comments.
Disclaimer: as with any mod, it is expected to work but if you fry your printer with it, you are on your own.
Note : colmoni has remixed the gantry parts so you can use them with the H-Bot configuration to make the gantry more rigid. They remain compatible with the CoreXY mod. You can get them at : https://www.thingiverse.com/thing:2767584