Dragon Mini Direct Drive Toolhead for Prusa Mini

Introducing the "Dragon Mini" Toolhead for the Prusa Mini 3D Printer, designed to accommodate the Dragon hotend and Sherpa Micro direct drive extruder.

Requirements:

• Prusa Mini 3D Printer
• Prusa Mini+ CFD-Optimized Fan Duct v2 carriage 
• Compatible Hotends (45.5 mm from nozzle to hotend mount):
  • Original Dragon hotend or clones
  • TZ V6 2.0 or TZ V6 3.0 hotends
  • Custom-built E3D V6 with a Dragon-style heatsink 
• Extruder: Sherpa Micro with Nema14 motor
• Material: Should be printed using temperature-resistant plastic such as ABS\ASA (tested) or PETG (not tested)
• DragonMini.stl needs supports for cantilever overhang's

Bill of Materials (BOM):

• 2x M3x14 screws for the fan and Pinda holder mount
• 2x M3x12 screws for Sherpa Micro mount
• M3x18 screw to replace the bottom M3x20 carriage screw
• 8x Voron Spec Heat Set Inserts (M3x5mm(OD)x4mm) and 2 more for ADXL bed mount
• PTFE Tube: 4 mm OD, 1.9 mm ID
• Original Prusa Mini Toolhead screws to mount original parts

Key Features:

• Original Nozzle Position:  Maintains the stock nozzle position from the CFD-optimized Fan Duct v2.
• Full XYZ Travel: The toolhead design ensures no collisions with printer parts, allowing full XYZ movement.
• Direct Drive Extruder: Provides improved extrusion control and filament compatibility.
• ADXL Mount Compatibility: Features a 15.5 mm mounting space, suitable for:
  • BIGTREETECH ADXL345
  • Mellow Fly-ADXL345-USB
• ADXL Bed mount model: Print, insert heat sets, mout with screws, and secure with double-sided mounting tape to the PEI sheet, the ADXL cable should be taped on the bed as well (using regular tape). Manual
• Klipper Firmware Compatible: Designed specifically for use with Klipper firmware, enabling advanced features and control.

Upgrade your Prusa Mini with the Dragon Mini toolhead for enhanced performance and compatibility with high-quality direct drive extrusion!

Klipper config (original thermistor and heater cartridge):

[extruder]
step_pin: PD9
dir_pin: PD8
enable_pin: !PD10
microsteps: 16
rotation_distance: 22.9703775
gear_ratio: 50:10
nozzle_diameter: 0.400
filament_diameter: 1.750
heater_pin: PB1
sensor_type: ATC Semitec 104GT-2
sensor_pin: PC0
control: pid
pid_Kp: 24.630
pid_Ki: 1.273
pid_Kd: 119.148
min_temp: 10
max_temp: 305
max_extrude_only_distance: 101

All new geometry of hotend holder.