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MK4/MK3S+ kit shipping from $50 (DHL)
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Original Prusa i3 MK3/S/+ to MK3.5 upgrade kit

MK3.5 upgrade contains the xBuddy board and new LCD, gives your MK3 the new 32-bit electronics, new connectivity options, Prusa Connect support, and also Input Shaper and Pressure Advance for high-speed printing. Nextruder is not included.

Not compatible with

 

This product is supplied as a kit - you must assemble it yourself!

Printed parts are NOT included! Please print them before you disassemble your MK3S/+! The filament is included in the upgrade package.

This product includes:

  • 32-bit xBuddy board (same as MK4)
  • Metal xBuddy case (and cover)
  • xLCD screen + cables (same as MK4)
  • Cable adapters for your current extruder and heatbed
  • Expansion joints for Heatbed
  • Fasteners and other accessories
  • Filament for printable parts

Parts kept from your MK3S/MK3S+

  • Extruder with V6 hotend
  • Frame and extrusions (the 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/E motors
  • X/Y/Z rods and bearings

*Please note that silver PSU will require a cable adapter. More information will be provided later.

 

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, no PTFE tube Aluminum heatsink, all-metal hotend, no PTFE tube
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

Kit price

249 USD / 279 EUR (VAT incl.) 499 USD / 549 EUR (VAT incl.) 579 USD / 639 EUR (VAT incl.)
  Buy MK3.5 upgrade Buy MK3.9 upgrade Buy MK4 upgrade

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