United StatesOriginal 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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