Prusa Research i3 MK2.5, Руководство пользователя

Страница: 14 / 70

6.2.2.1 Double-sided textured PEI powder-coated spring steel sheet
Powder coating directly on metal makes it very hard to damage this build plate. If a heated
nozzle crashed into it, the metal can dissipate the heat. Powder coating also gives the
surface a distinct textured look that will be visible on your prints.
The textured surface hides most of the mechanical damage caused by tools. Only the top of
the small bumps can be scratched, which will not imprint on the bottom of the model.
This surface is used on our print farm, look at the printed parts you have on your printer for
reference.
6.2.2.2 Double-sided glossy PEI powder-coated spring steel sheet
Uses the same technology as the textured sheet but PEI particles used are smaller causing
the final surface finish to be glossy. Produces glass like first layer.
Be careful with tools, this surface is easy to mark and those marks then imprint on the first
layer. Marks do not affect the functionality or adhesion.
6.2.2.3 Spring steel sheet with smooth double-sided PEI
Uses the same PEI sheets as on the MK2/S.
You can leave small marks on the print surface with your nozzle or tools, they will typically
be shinier than the rest. It does not affect the functionality or adhesion. However, if you want
to have the same surface look on the whole printbed you can resurface it. The easiest way is
to take the hard side of a dry kitchen sponge and gently wipe the affected area with a
circular motion a few times.
The industrial glue which holds the PEI sheet on the heatbed itself softens when
temperatures greater than 110 °C are used. If higher temperatures are used, the
glue can migrate under the PEI and create slight bumps on the surface.
6.2.2.4 Aftermarket sheets
As MK2.5 is fully open source, we expect other manufacturers to manufacture after market
compatible sheets. Look for the reference online before buying some, or check with our
online support.
Sheets must be coated from both sides! If only one side is coated, the metal edge on
the bottom side can damage the heated bed surface when protective lacquer is
scratched off.
14