Ender 3 BigTreeTech Conversion

A heavily modified Creality Ender 3 / Ender 3 Pro rebuild centered around a BigTreeTech Manta M4P + CB1 Klipper stack.

This repository collects the printer configuration, build notes, wiring details, calibration notes, project photos, and the printable parts used during the conversion.

Project owner: TuxiNet.dk / Thomas
Status: hardware bring-up, fitment work, and calibration in progress.

Build Snapshot

• Base printer: Creality Ender 3 / Ender 3 Pro platform
• Main board: BigTreeTech Manta M4P V2.2
• Host module: BigTreeTech CB1
• Stepper drivers: BigTreeTech TMC2225 configured as TMC2208 UART
• Display: BigTreeTech Mini12864
• Filament sensor: BigTreeTech Smart Filament Sensor V2.0
• Probe plan: BigTreeTech Eddy Coil V1.0, not active yet
• Firmware stack: Klipper + Moonraker + Mainsail

Photo Gallery

More build photos are stored in pic/.

Current State

Working now:

• Manta M4P V2.2 connected and talking to Klipper
• CB1 running the Klipper host stack
• X, Y, and Z motion tested
• Y direction corrected
• X/Y/Z endstops working
• Heated bed working
• Hotend heater working
• Extruder working
• Smart Filament Sensor V2.0 connected
• FAN2A / FAN2B verified on PD4
• Mini12864 display enabled with brighter backlight

Still pending:

• Final mounting for FAN0 and FAN1
• PID tune for hotend and bed
• Extruder rotation distance calibration
• Eddy Coil setup and calibration
• Bed mesh after probe setup
• Final slicer profile tuning
• First controlled print test

Repository Map

• klipper/printer.cfg -> main Klipper configuration for the current machine
• docs/project-background.md -> why the rebuild was done and what performance to expect
• docs/wiring.md -> wiring notes and pin mapping
• docs/klipper-setup.md -> Klipper host and board setup notes
• docs/calibration.md -> calibration workflow
• docs/troubleshooting.md -> fixes and known pitfalls
• slicer/cura-orca-notes.md -> slicer notes for Cura and OrcaSlicer
• Ender_Mod/ -> STL/3MF files, downloaded source packs, and model variants used during the build

Quick Start

1. Copy klipper/printer.cfg to ~/printer_data/config/printer.cfg.
2. Restart Klipper.
3. Verify the MCU serial path.
4. Verify endstops.
5. Verify each stepper before attempting a print.

sudo service klipper restart
ls -l /dev/serial/by-id/

QUERY_ENDSTOPS
STEPPER_BUZZ STEPPER=stepper_x
STEPPER_BUZZ STEPPER=stepper_y
STEPPER_BUZZ STEPPER=stepper_z
STEPPER_BUZZ STEPPER=extruder

Printable Parts and Reference Links

Reference confidence used below:

• Confirmed = source link was bundled in the repo download package, or the file naming matches the published model very closely.
• Likely = strong filename or photo match, but the exact upstream file package was not bundled in the repo.

Confirmed Matches

• Confirmed Aluminum extrusion profile universal GT2 belt tensioner -> likely source family for Ender_Mod/X_tensioner_case.stl, Ender_Mod/Y_tensioner_case.stl, Ender_Mod/Belt_ten.stl, Ender_Mod/tensioner_puller_R15.stl, and Ender_Mod/puller_nut.stl.
• Confirmed Another Pi Cam Mount (Pi Cam 1.3) Ender 3 -> bundled in Ender_Mod/Another Pi Cam Mount (Pi Cam 1.3) Ender 3 - 4737511/.
• Confirmed Ender 3 dual Z axis with optional frame braces -> bundled in Ender_Mod/Ender 3 dual Z axis with optional frame braces - 3746653/ and visually aligned with Ender_Mod/Bottom_Left.stl, Ender_Mod/Bottom_Right.stl, Ender_Mod/Dual_Z_Rail_Brace_-_Belt_Tension_Style_left.stl, and Ender_Mod/Dual_Z_Rail_Brace_-_Belt_Tension_Style_right.stl.
• Confirmed Ender 3 Lead Screw Stabilizer -> bundled in Ender_Mod/Ender 3 Lead Screw Stabilizer - 3080912/.
• Confirmed Ender 3 Pro Power Supply Relocate -> bundled in Ender_Mod/Ender 3 Pro Power Supply Relocate - 4794728/ and related to Ender_Mod/Ender_3_Pro_Power_suply.stl and Ender_Mod/PSU_Cover.STL.
• Confirmed Allen Key ABL Probe for Ender3 Pro, stock parts -> direct filename match for Ender_Mod/Used/Allen_key_probe_E3_zizi_v4.stl.
• Confirmed FreeABL - the ultra cheap (free) ABL for Ender 3 -> strong match for Ender_Mod/Used/Bracket-CR_Touch_Fixed.STL and Ender_Mod/Used/Bracket-Extension_Long.STL.
• Confirmed CR-10 / Ender3 DTI holder for bed alignment -> strong match for Ender_Mod/dial_indicator_holder_v2.stl.
• Confirmed LED holder for x-axis ender3 -> strong match for Ender_Mod/LED_light_holder.stl.

Likely Matches

• Likely Ender 3 - M4P Electronics Enclosure -> likely source for Ender_Mod/Used/Ender - MP4 Controller Mount - Left Half.STL, Ender_Mod/Used/Ender - MP4 Controller Mount - Right Half.STL, Ender_Mod/Used/Ender - MP4 Controller Mount - Left Cover.stl, and Ender_Mod/Used/Ender - MP4 Controller Mount - Right Cover.stl.
• Likely MKS MINI12864 V3 (Front Style) Enclosure -> likely source for Ender_Mod/Used/MKS MINI12864 V3-F Case_Front Style.stl and Ender_Mod/Used/MKS MINI12864 V3-F Cover.stl.
• Likely Tray box for Ender 3 -> likely source or inspiration for Ender_Mod/tray_whithout_hex.stl.
• Likely Ender 3 / Ender 3 Pro dual Z axis -> likely related to the broader dual-Z conversion parts and hardware approach kept in this repo.

Unresolved / Still Worth Tracing

These parts exist in the repo, but I could not tie them to a fully reliable original model page from the repo contents alone:

• Ender_Mod/creality-ender-3-pro-dual-double-drawers20210716-6689-1wx5khx/...
• Ender_Mod/BigTreeTech - TFT35/
• Ender_Mod/Manta/
• Ender_Mod/Used/Housing_Front_Arducam.STL
• Ender_Mod/Used/Housing_Back_Arducam.STL
• Ender_Mod/SfsV2.0_Minion_ReverseBowdenV1.0.stl
• Ender_Mod/lcd-mount.stl
• Ender_Mod/Display_Ender.stl

Wiring Snapshot

The current printer configuration in klipper/printer.cfg is built around:

• STM32G0B1 on the Manta M4P
• Cartesian kinematics
• BigTreeTech Mini12864
• BigTreeTech Smart Filament Sensor V2.0
• BigTreeTech Eddy Coil V1.0 reserved for later activation

Current endstop pins:

Axis	Port	Klipper pin
X	X_STOP	^!PC0
Y	Y_STOP	^!PC1
Z	Z_STOP	^!PC2

Current fan mapping:

Fan port	Pin	Intended use
FAN0	PD2	Part cooling
FAN1	PD3	Hotend heatsink
FAN2A / FAN2B	PD4	Electronics / enclosure cooling

Safety Before First Print

1. Verify endstops with QUERY_ENDSTOPS.
2. Verify motor motion with STEPPER_BUZZ.
3. Confirm thermistors read a realistic room temperature.
4. PID tune the hotend and bed.
5. Calibrate extruder rotation distance.
6. Verify all fans before printing enclosed or high-heat materials.
7. Keep the Eddy probe disabled until the printer behaves correctly with the physical Z endstop.

Notes

• This is not a stock Ender 3 anymore. Treat every wiring diagram, slicer profile, and firmware snippet as build-specific until verified.
• Some STL files appear to be renamed, remixed, or exported variants. The reference list above points to the best source page match I could confirm from the repo contents and build photos.
• The remaining unresolved STL files can be traced in a second pass if needed.