RX projects for Cartesian (5015 fan) V3

📐 Want to download the STEP files?
Support the project and get access to all design files on my Patreon

🔗 Hop into the Discord

 If you’re chasing top-tier print quality without breaking the bank, this DIY A1-style is a game-changer. It’s not just a copy — it’s modular, efficient, and full of smart upgrades that rival even the original.

✅ Why Build One?
   •    Incredible print quality — Fully compatible with Bambu slicer profiles
   •    Quick-swap nozzles — Get back to printing in seconds
   •    Modular design — Upgrade and replace parts with ease
   •    Integrated filament sensor — Internal and reliable
   •    Auto filament loading + single-button unload — Smooth and user-friendly
   •    Lightweight toolhead — Perfect for input shaping and high-speed accuracy
   •    Affordable parts — Clone components are widely available and budget-friendly
   •    Consistently reliable — Solid mechanical structure, built to last
   •    Looks clean & professional — Not your average DIY toolheads 

This toolhead was made for Linear rails MG9 and tested on Cartesian printers only. If you want, you can get the .STEP files and adapt them to your desired rails or printer model

I also made a version for Vorons that you can find here

   After installing here is the new Rotation distance for A1 gear [rotation_distance: 4.7123281892773 ]

STEP BY STEP build guide( V2)

Note: All links are provided for convenience. Buy if you want to buy from them, or you can find your own buying source.

# 🛠 Printhead Parts List

⚙🔥 Extruder & Hotend Parts

A1 Original Extruder Gear

A1 Extruder Gear (Aftermarket)

X1/P1 Extruder Motor

A1 / A1 Mini Hotend

A1 Hotend Heating Assembly

X1/P1P Hotend

X1-C Thermistor & Cartridge Heater

🧠 Electronics & Sensors

BIGTREETECH EBB36 CAN Bus

BIGTREETECH EBB42 CAN Bus

BIQU MicroProbe

Tactile Push Switch Button

Micro Switch (wears out)

Micro Switch KFC Type (long lifespan)

🧱 Mechanical & Frame Components

MGN9H Linear Guide Rail

Hotend Cooling Fan 25x10mm

Model Cooling Fan GDSTIME 5015 Blower

6x2.5  Magnet

Spring

🔩 Fasteners, Bearings & Misc

M3 Square Nuts

M3x20mm Dowel Pin

Extruder Ball Bearing MR104

Metric Screws Kit

M3*4*4.2  Heat Set Insert

Pneumatic Fittings PC4-M6