Original Prusa i3 MK3/S/+ to MK3.9S Upgrade Kit

The Original Prusa i3 MK3/S/+ to MK3.9S Upgrade Kit is an official enhancement package designed to elevate your MK3, MK3S, or MK3S+ 3D printer to the MK3.9S standard. This upgrade introduces significant hardware and software improvements, including the advanced Nextruder system, a 32-bit xBuddy motherboard, a modern xLCD interface, and enhanced connectivity options such as Wi-Fi and Ethernet. These enhancements collectively contribute to improved print quality, reliability, and user experience.
Please note that this upgrade requires self-assembly and the printing of certain parts. A spool of PETG filament is included for this purpose.

Key Features:

• Nextruder System: Provides precise filament control and improved extrusion reliability.
• xBuddy 32-bit Motherboard: Offers faster processing, better thermal management, and supports advanced features like Input Shaper and Pressure Advance.
• xLCD Interface: Modern user interface with enhanced display capabilities.
• Enhanced Connectivity: Includes Wi-Fi and Ethernet support for remote monitoring and control via Prusa Connect.
• Improved Cooling: Features a high-performance 360° cooling system for consistent print quality.
• Advanced Sensors: Incorporates a load cell sensor for automatic first-layer calibration and filament detection.

Product Specifications:

• Compatibility: Original Prusa i3 MK3, MK3S, and MK3S+
• Upgrade Target: Converts printer to MK3.9S specification
• Firmware Requirement: Latest firmware version recommended for optimal performance
• Printing Requirement: Printed parts required (not included; STL files provided)

This product includes:

• 32-bit xBuddy board (same as MK4)
• Metal xBuddy case (and cover)
• xLCD screen (same as MK4)
• Nextruder parts (including E motor)
• Cables for Nextruder, Heatbed, xLCD
• Expansion joints for Heatbed
• New belts for X & Y axes
• Fasteners and other accessories
• New rods and bearings for Z axis
• PCCF printed parts
• Injection molded parts (PG cover and xLCD cover)
• WI-FI module
• NFC module
• High-Performance 360° Cooling Fan and Fan shroud
• High-flow Prusa CHT nozzle - 0.4 mm
Parts kept from your MK3S/MK3S+
• Frame and extrusions (new MK4S has just a different look)
• PSU* (same wattage/voltage as MK4S)
• Heatbed MK52 24V (thermistor and power cables will be changed)
• X/Y/Z motors
• X/Y rods and bearings
*Please note that silver PSU will require a cable adapter. More information will be provided later.