Welcome to a complete, high-performance toolhead upgrade designed specifically for the Kingroon KP3S. This custom extruder is engineered to maximize reliability and versatility, integrating the pushing power of a BMG (Bondtech Mini Geared) system into a rigid, compact form factor.

Whether you are aiming for intricate details, the convenience of rapid nozzle swaps, or high-flow extrusion for faster print times, this modular design adapts to your needs. It features dedicated mounting options for three distinct hotends:

• E3D V6: The classic, reliable workhorse for precision and standard everyday printing.
• E3D Revo Six: The perfect setup for makers who want the ultimate convenience of tool-free, cold nozzle changes.
• E3D Volcano: The go-to choice for high-flow extrusion, allowing you to push filament faster and tackle larger prints.

Designed with a focus on ease of assembly, structural stability, and optimal part cooling, this toolhead is built to help you get the absolute best performance out of your KP3S.

Attached you can find the assembly instructions and Marlin 2.0.9.2 firmware for this mod. This firmware is for the STM32F1 chip. If you have the latest version of Kingroon, you need to compile the firmware for the STM32F4 chip (mks_robin_nano_v1_3_f4).

Link to Marlin firmware 2.0.9.2 (horizontal screen)

 https://mega.nz/file/LI8WBS5R#EU7ULR0oeG9HTbF8qcseW8A1WgQMYzh2EJnoNZlBOb4

Link to Marlin firmware 2.1.1 (vertical screen)

https://mega.nz/file/OBNDRATa#w5iyOqWC1HFmNisbF00b2U8px8J1-0IgsJ2F0JHnEAY

Offset BLtouch

• X=16.65 Y= -39.65

Offset Inductive

• X=-26 Y= -36.8

Material list:

• 1 unit – DDB Extruder V2.1
• 1 unit – Motor Nema 17 25mm
• 1 unit – Hotend V6 (Optional upgrade: Revo Six)
• 60-70 mm – PTFE Capricorn
• 1 unit – Thermistor ATC Semitec 104GT (I recommend changing the original)
• 1 unit – 40W Heater Cartridge 24V (you can use the original)
• 1 unit – Fan 5015 24V
• 1 unit – Fan 4010 24V
• 3 units – Screw DIN 7380 M3x8
• 4 units – Screw DIN 7380 M3x10
• 2 units – Screw DIN 7380 M3x16
• 4 units – Screw DIN 7380 M3x20
• 2 units – Screw DIN 7380 M3x30
• 2 units – Nut DIN 934 M3
• 3 units – Self-Locking Cable Ties 2.5x100 mm

Optional:

• 1 m – Cable Sleeve Self Closing PET 13mm