1. Introduction
Original Prusa MK4/MK3.9 to MK4S/MK3.9S upgrade 7
STEP 3 What will be upgraded?
MK4/MK3.9 upgrade to MK4S/MK3.9S includes changes to:
New Y-axis tensioning mechanism printed from PCCF material for greater heat
resistance.
New injection molded xLCD cover.
It is compatible with certain xLCD board versions. In case of incompatibility, a
new printed cover will be provided—more information is in the relevant chapter
of the manual.
New 360° cooling on the Nextruder.
New high-flow Prusa Nozzle CHT.
Improved Wi-Fi antenna.
Brand new NFC antenna.