View the model in 360 here
NOTEβ β . The new version 2.6 and future versions, including full STEP files, are now completely free on my Makerworld, as their points system works better. Please remember to support me there!
Sorry for the inconvenience of changing platforms, but creator rewards are important for us to keep making new projects.
The .STL/.3mf is completely free here, and some step files if you need to adapt a different type of probe
Support the project and get access to all STEP design files on my Patreon (if you already purchased V1 files, you have full access to V2 files)
π Hop into the Discord
If youβre chasing top-tier print quality without breaking the bank, this DIY A1-style and H2D is a game-changer. β Itβs modular, efficient, and full of smart upgrades that rival even the original.
β Why Build One?
β’ Compatible with bambu A1, H2D,P1P,P1S hotned.
β’ Incredible print quality β Fully compatible with Bambu slicer profiles
β’ Quick-swap nozzles β Get back to printing in seconds
β’ Modular design β Upgrade and replace parts with ease
β’ Integrated filament sensor β Internal and reliable
β’ Auto filament loading + single-button unload β Smooth and user-friendly
β’ Lightweight toolhead β Perfect for input shaping and high-speed accuracy
β’ Affordable parts β Clone components are widely available and budget-friendly
β’ Consistently reliable β Solid mechanical structure, built to last
β’ Looks clean & professional β Not your average DIY toolheads
Whatβs new
V2
β New filament cutter β integrated with a Bambu-style cutter blade for reliable and precise filament trimming.
β Optimized wall thickness β reduced across most parts, making the toolhead lighter and better suited for input shaping.
π Filament sensor repositioned β now mounted on top for easier access and to free up space for the filament cutter.
π Neopixel LED wire guide β added for cleaner cable management and a more organized setup.
π§ Carriage refinements β improved ducting and minor structural adjustments for better overall performance and durability.
π¬ Duct system upgrade β optimized cooling performance and made installation even easier.
π§© Carriage improvement β updated design for better Micro Probe compatibility.
Itβs an evolution. π§π¨
Youβll be surprised how it performs
This printhead requires CPAP cooling
After installing, here is the new Rotation distance for A1 gear [rotation_distance: 4.7123281892773 ]





I chose the A1 single-gear extruder because it consistently produces cleaner surfaces and fewer gear marks than dual-gear designs. Fewer mating teeth and a simpler filament path mean less micro-slip, lower backlash and fewer vibration/feeding artifacts β which is exactly what PRINTING PERSPECTIVE showed in his tests. In practice (with my RX toolhead), the A1 extruder gear gives almost no visible VFAs on prints and handles flexible filaments more gently than the dual-gear alternatives.





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I did a video in another version I made for my A1 mini clone. If. If you need some idea how it works, check it
BOOM
Note: All links are provided for convenience. Buy if you want buy from them or you can find your own buying source.
# π Printhead Parts List
This is a curated list of components used in the printhead build, organized by category.
Links are provided for reference (Amazon, Bambu Store, Alibaba, etc.).
π₯Hotend & Heating Components
H2D Heating Assembly β Amazon | Bambu Store
H2D High Flow Nozzle β Amazon
A1/A1 Mini Hotend β Amazon
A1 Hotend Heating Assembly β Amazon
X1/P1P Hotend β Amazon
X1-C Thermistor & Cartridge Heater β Amazon
β Extruder & Drive Parts
A1 Original Extruder Gear β Amazon
A1 Extruder Gear (After-market) β Amazon
X1/P1 Extruder Motor (they are different than other stepper the gear head is twisted) β Amazon
Extruder Ball Bearing MR104 β Amazon
Filament cutter Blade - Amazon | Bambu Store
π Cooling & Fans
Hotend Cooling Fan 25Γ25Γ10mm β Amazon 1 | Amazon 2
π Motion & Mechanics
Spring β Amazon
(π‘ Tip: For the Filament cutter spring you can use any pen spring just chose the strongest one)
M3Γ20mm Dowel Pin β Amazon
6Γ2.5 Magnet β Amazon
π© Hardware & Fasteners
Metric Screws Kit β Amazon
M3*4*4.2 Heat Set Inserts β Amazon
π² Switches & Sensors
Micro Switch β Amazon
3.5 mm Ball Bearing β Amazon
π‘ Tip: If available, you may also reuse the 3.5 mm balls found inside some 5 mm T-slot nuts.
BIQU MicroProbe β Amazon
π Electronics & Boards
BIGTREETECH EBB36 CAN Bus β Amazon






The author marked this model as their own original creation.