ENDER 4 COMPACT COREXY CONVERSION

thingiverse

THIS IS A WORK IN PROGRESS. IT HAS BEEN PRINTING FOR SEVERAL DAYS NOW WITHOUT INCIDENT, BUT I AM STILL MAKING SMALL ADJUSTMENTS AS I TEST IT. This is a custom corexy conversion based on my Ender 4 frame. It can be used on any square frame. The main goal was to fix a significant racking issue I had with my stock Ender 4 H-Bot design. This has completely eliminated all racking issues and circles are now perfectly circular. NOTE- This currently limits print size in the Y direction to 217mm. I will modify the design slightly in the future to address this. X axis was limited to 220 in firmware but in reality it should be more like 230. I will have to adjust the firmware to test. There are other corexy conversions on Thingiverse, but there were some major differences I wanted to address: 1- The motor mounts and front pulley mounts are all designed to strengthen and square the frame. 2- Belts are close to the frame for both appearance and to reduce the chance of hitting them and messing up a print. 3- All parts are minimal to reduce weight while still being solid. I used all stock screws and components except for the following. All sizes will be updated when I get a chance: 1- 6-toothed pulleys (2 for Y Gantry and 4 for front pulleys) ("X tooth" with 3mm hole) 2- 4 M3 screws with nuts (2 for front pulleys on Y Gantry and 2 for front pulley holders) 3- 3 M5 screws and nuts for X Gantry wheels to reach through the back part. I am still working on a new X Gantry with parts cooler fan. I still need to measure and print spacers for small-toothed pulleys to keep them centered on mounting screws, but it prints just fine as is. In order to create room for the belt to run between the Y Gantry and the frame, I had to cut off approximately 10mm from the aluminum extrusion used for the X axis. I simply used a hacksaw. I started designing this last year but was then deployed for six months and had to continue this year, so there may be some little issues that I have missed. If you have any suggestions or comments, please leave them and I'll see what I can do. Also, don't mind the screwdriver in the front right pulley holder; I didn't have a long enough M3 screw, so I'm using it as a temporary mount. Video of it in action is available in the instruction area.