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Basic importing, slicing and exporting 3D objects is simple. However, PrusaSlicer has advanced
menus and settings for experienced users, allowing for a higher level of control.
Want to learn more about PrusaSlicer?
Visit our Blog at https://www.prusaprinters.org where we publish tips, tricks and extensive
guides that will turn you into a master of slicing!
6.5. Slicing objects for the SL1S
Every 3D model is different, so an individual approach is needed for every single object.
However, we can still offer several tips, tricks and hints that will make the slicing and printing
processes easier. If you already have experience with FFF/FDM printing, you will notice that
the
preparation of models for SLA printers is slightly different. These chapters will explain all the
steps required for a successful preparation of a model for printing - this covers support
generation, explanation of terms such as pad, exposure or layer height, and many other things.
Learn about SLA supports!
SLA has a completely different type of supports and different object orientation compared to
FFF/FDM 3D printers. If you already own one of our Original Prusa i3 3D printers, you should
check out the main differences below.
There are several goals you should try to meet as closely as possible when preparing an object for
slicing/printing.
SLA is an additive manufacturing method - objects are created layer-by-layer, which means
that layers are added on top of existing ones and they cannot be created mid-air. Such parts
must be supported with supports, a scaffolding-like structure. Choosing a good object
orientation minimizes the amount of supports needed. Supports for SLA are different
compared to FFF/FDM 3D printers.
Decide when to use the pad and/or supports - for some objects, using the pad and supports
is not mandatory. One of such examples is the model of Eiffel tower. It has four reasonably
sized contact points, which can be placed directly on the print platform. Since the tower rises
at an optimal angle, no supports are required.
Tilted models produce better results - when you have an object with a large flat base, it’s a
good practice to rotate it, so it raises under an angle of around 45° in two axes depending on
the model’s shape. Tilted models require lesser peeling force during layer separation process
Decide between quality and “safety” - even though supports for SLA printers are tiny
compared to FFF/FDM printers, they can still leave small marks on the object’s surface. If you
rotate the object so the important parts are facing away from the print platform, it will help
you to conserve details on the print. However, sometimes it’s better to add a higher number of
supports for a “safer” print - especially when printing larger objects that may detach due to
their weight. Thicker supports are an option, too.
Object orientation affects the print time - tall objects will take longer to print than shorter
ones. Consider rotating the object to save time.
Consider making the printed object hollow - SLA prints in general can sometimes fail due to
excessive suction: basically, when you print an object, the printer needs to separate it from the
tank bottom. If the print has a large flat area or a cavity, the suction can be so strong, the
object will detach from the supports / print platform. PrusaSlicer has a Hollowing tool built-in.