Prusa MK3S+ to MK3.9 Upgrade Kit

 

The MK3.9 upgrade is almost everything from the MK4 excluding the XYZ motors. The Nextruder motor is included in this kit.

 

Please note that this product is supplied as a kit, which means that assembly is required. The kit includes all the necessary components, except the printed parts (however the filament required is provided), to assemble the product yourself. With the provided instructions and guidance, you can enjoy the process of building your own printer and gain a deeper understanding of its inner workings. Get ready for a hands-on experience and the satisfaction of completing the assembly to bring your printer to life.

 

Take a look at the manual before you buy to see the assembly process.

Before you order the upgrade, please check which PSU your printer came with and which version of the heatbed connector is installed. This is important for correct compatibility with the upgrade. 

 

psu comparison foto

 

Which PSU does your printer have?

  • Black PSU - you are all good
  • Silver PSU - contact us to customise this kit
heatbed comparison foto

 

How many screws does your heatbed have?

  • 2+3 screws (power cable connected with screws) - you are all good
  • 2+1 screws (power cable soldered) - replacing the bed will be necessary
 

 

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
  • Filament for printable parts

 

Parts kept from your MK3S/MK3S+:

  • Frame and extrusions (new MK4 has just a different look)
  • PSU* (same wattage/voltage as MK4)
  • Heatbed MK52 24V (thermistor and power cables will be changed)
  • X/Y/Z motors
  • X/Y rods and bearings

 

MK3S/+ Upgrades Comparison

MK3S/+ Upgrades Comparison

  MK3.5 upgrade MK3.9 upgrade MK4 upgrade
Build volume 250 x 210 x 210 mm | 9.84 x 8.3 x 8.3 in 250 x 210 x 220 mm | 9.84 x 8.3 x 8.6 in 250 x 210 x 220 mm | 9.84 x 8.3 x 8.6 in
Mainboard Custom 32-bit xBuddy electronics with STM32 Custom 32-bit xBuddy electronics with STM32 Custom 32-bit xBuddy electronics with STM32
Stepper Drivers Trinamic 2130 Trinamic 2130 Trinamic 2130
Stepper motors Regular 1.8° X,Y stepper motors Regular 1.8° X,Y stepper motors Precise 0.9° X,Y stepper motors (prevents VFA)
MMU3 support Yes Yes Yes
Extruder electronics No Custom breakout board for connecting fans, thermistors and other parts. Custom breakout board for connecting fans, thermistors and other parts.
Filament path Aluminum heatsink, all-metal hotend Aluminum heatsink, all-metal hotend Aluminum heatsink, all-metal hotend
Drive system Direct drive Nextruder Planetary Gear System, 10:1 gearbox ratio Nextruder Planetary Gear System, 10:1 gearbox ratio
First layer calibration Manual adjust Z Fully automatic (thanks to the Load Cell sensor) Fully automatic (thanks to the Load Cell sensor)
Quick-Swap nozzle system No Yes Yes
LCD screen 3.5″ graphic 65k color screen 3.5″ graphic 65k color screen 3.5″ graphic 65k color screen
Bed calibration Automatic, Mesh Bed Leveling Automatic, Mesh Bed Leveling (only on print area) Automatic, Mesh Bed Leveling (only on print area)
One-click Printing Yes Yes Yes
Status LEDs Yes Yes Yes
Input shaper Yes Yes Yes
Filament Sensor Yes (IR) Yes (built-in Hall sensor) Yes (built-in Hall sensor)
Loadcell sensor No Yes Yes
Advanced sensors 3 thermistors + SuperPINDA, fan RPM sensors Filament sensor, Loadcell sensor, Power panic, 4 high-precision thermistors (genuine Semitec) + fan motors RPM monitoring Filament sensor, Loadcell sensor, Power panic, 4 high-precision thermistors (genuine Semitec) + fan motors RPM monitoring
Power panic Yes Yes Yes
Ethernet connection Yes Yes Yes
Wi-Fi connection Yes Yes Yes
Prusa Link Integrated Integrated Integrated
Print medium USB drive / LAN / internet via Prusa Connect USB drive / LAN / internet via Prusa Connect USB drive / LAN / internet via Prusa Connect
Firmware update interface USB drive USB drive USB drive

 

(51190)

SKU 51190
Brand Prusa
Shipping Weight 4.4000kg
Shipping Width 0.250m
Shipping Height 0.170m
Shipping Length 0.440m
Shipping Cubic 0.018700000m3

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