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Original Prusa i3 MK3/S/+ to MK4 upgrade kit
Original Prusa i3 MK3/S/+ to MK4 upgrade kit
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Why is our price different than buying direct from Prusa? Click here to read our article on our pricing.
This is the full upgrade that also contains the MK4’s new X/Y precise motors (400 steps, 0.9°per step). It’s the most expensive of all three, but last time you voiced your interest in a full MK2->MK3 upgrade pretty strongly, so we decided to give you a full MK4 upgrade as well. :-)
Before you order the upgrade, please check which PSU your printer came with and which version of the heatbed connector is installed. This kit only works if you have the black power supply and not a silver power supply. Your heatbed must have screws and is NOT solder on.
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.
Important: The black injection-molded spool holder is not part of the upgrade package. If your printer didn't come with it (early revisions of MK3), you can purchase it here.
Here is a closer explanation of the difference between the MK3.9 and MK4 upgrade packages: the only difference is in the stepper motors. The MK4 uses higher-precision stepper motors that help eliminate VFA (Vertical Fine Artifacts) – these are tiny surface artifacts that are visible if you closely inspect a printed object. In other words, the motors in the full MK4 upgrade are the cherry on top – if you’re chasing the highest possible level of quality, they will come in handy.
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
- 10 mm smooth rods (Z-axis)
- X/Y/Z motors
- Expansion joints for Heatbed
- New belts for X & Y axes
- Fasteners and other accessories
- 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 rods and bearings
*Frame and heatbed are not included upgrade, because replacing these parts brings no funcional advantage and would only increase the price of the upgrade. If for some reason you still want a new frame (it has hexagons on the other side), it will be available on the eshop as a spare part.
**Please note that silver PSU will require a cable adapter. More information will be provided later.
- Reviews
- Questions
United StatesParts were not sent
I did not get the nextruder hotend sink was not in the box and we have to purchase another one from Prusa
United StatesMk3S+ upgrade to Mk4. Files won’t upload
Not able to load or print needed parts so can’t upgrade. After 5 years experience with Prusa printers I am surprised at this. I design and print everyday but can’t get these files to the Slicer program. Would sure appreciate instruction help. Sincerely, JohnC
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