7.3.1.3 Hardened steel nozzle by E3D
Hardened steel nozzles are a must for
highly abrasive materials
. Regular brass nozzles
will degrade very quickly and lose their properties.
Most of the abrasive materials are composites, plastics with additives. Some examples are
ColorFabb XT CF20, ColorFabb Bronzefill, ColorFabb Brassfill and some glow-in-the-dark
filaments. Always ask your filament vendor if you are not sure. A slight disadvantage is that
some standard materials like ABS are not able to be printed as fast as with a regular nozzle.
7.3.1.4 The Olsson Ruby nozzle
Similarly to the hardened steel nozzle, the Olsson Ruby is designed to print highly abrasive
materials. However, since most of it is made from brass, it retains the excellent heat
conductivity and throughput of the stock brass nozzle. Even though the ruby gemstone is
highly wear resistant, it’s also brittle. If you have your Live Z adjust set incorrectly (extremely
low - big negative number) or if you misalign your SuperPINDA probe and the nozzle hits the
removable steel sheet, it may crack. Do not overtighten the nozzle (1 Nm max).
7.3.2 Original Prusa Multi Material Upgrade 2S
Multi Material Upgrade 2S is the successor to the second generation of our unique addon,
which enables your 3D printer to print with up to 5 colors at the same time.
Now compatible with the Original Prusa i3 MK2.5S and MK3S+ 3D printers, the MMU2S
went through a major revision, resulting in a simpler and more reliable design. The number
of simultaneously supported filaments increased to the total of five, which enables the users
to print even more complex and more colorful objects.
MMU2 and MMU2S units are almost the same, but the printer extruder is equipped with a
new filament sensor mechanism, which improved the reliability of the MMU2S unit. Thanks
to the new design and placement of the filament sensor, the MMU2S unit now has feedback,
that the filament is loaded into Bondtech gears. In addition, the filament length calibration is
no longer required.
MMU2S comes with a redesigned body and a new filament loading mechanism. Instead of
the previous Bowden system on the MMU1, the new unit uses a direct-drive feed and a
single PTFE tube to lead the selected filament to the extruder. The motorized selector head
has a F.I.N.D.A filament sensor and a built-in blade, which prevents filament jamming.
To unlock the full potential of the MMU2S, use our latest PrusaSlicer slicing software, which
comes with new features, such as Smart wipe tower, Wipe into infill or Wipe into object.
To learn more, visit the official website
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