Duender - 2X Creality Ender-3 CoreXY convertion

This project is a conversion of two old Ender-3 printers into a single CoreXY 3D printer. The goal was to reuse as many original components as possible, minimizing the number of extra parts needed for the build. The result is a fast, stable, and modern printer that gives new life to outdated machines.

The design is built around the frames, motors, and many mechanical parts from the two Ender-3s. Some additional components, such as bearings, belts, and aluminum plates, are required, but the total cost remains significantly lower than buying a new CoreXY printer.

Video about creating this project.

A step-by-step assembly guide available as a video tutorial on my YouTube channel.

If you have two old Ender-3 printers collecting dust, this project provides a way to transform them into a high-performance CoreXY system while keeping costs low and making the most of the parts you already own.

My Discord server: 

https://discord.gg/ae44FHv786

Update Log – Version 1.1

• Moved XY motor mounting holes 1mm inward to prevent collisions with the frame profile.
• Added motor brackets to maintain the motor angle and prevent tilting due to belt tension and heat.

Parts to buy:

F623RS Bearing 3*10*4 mm - 20 pcs

2X https://s.click.aliexpress.com/e/_olodFcZ

GT2 Belt 6mm - 2pcs 1.5m (Size C - Color 5m)

https://s.click.aliexpress.com/e/_ooDLTEH

Aluminum Profile Connector Set - 40pcs Corner Bracket + 80pcs M5x8mm Hex Socket Cap + 80pcs 20 Series M5 T-slot Nuts

2X https://s.click.aliexpress.com/e/_omYaiBL

Models for printing:

Z-Axis 

• Bed Hold L.stl
• Bed Hold R.stl
• Z Mount L.stl
• Z Mount R.stl
• Z Top Mount L.stl
• Z Top Mount R.stl

X-Axis

• X Mount L.stl
• X Mount R.stl

Y-Axis

• Belt Tensioner L.stl
• Belt Tensioner R.stl
• Front Hold L.stl
• Front Hold R.stl
• Y Left Motor 1.stl
• Y Left Motor 2.stl
• Y Right Motor 1.stl
• Y Right Motor 2.stl
• Y Motor Holder L
• Y Motor Holder R

Spacers

• M3 1.6mm Spacer.stl (×16)
• M3 2mm Spacer.stl (×2)
• M3 10mm Spacer.stl (×2)
• M8 1mm Spacer.stl (×2)
• M8 10mm Spacer.stl (×2)

Electronics

• Electronic Box Cover.stl
• Electronic Box Main.stl

Extruder H2

• 5015 H2 Cooling.stl
• Bltouch Mount.stl
• Extruder H2 Mount.stl

Aluminum plates (needs to be made by yourself)

• Z Alum Plate L.stl
• Z Alum Plate R.stl
• X Alum Plate L.stl
• X Alum Plate R.stl

Drill Guides

• Extruder Plate Guide.stl
• Y Left Plate Guide.stl
• Y Right Plate Guide.stl
• Z Left Plate Guide.stl
• Z Right Plate Guide.stl

If you want and are able to support the project and my channel:

https://www.patreon.com/Irbis3D

https://buymeacoffee.com/Irbis3D