Here are the settings for the Prusa Slicer v2.0 that we recommend and use on our Prusa I3 Mk3’s.
Layers and Perimeters
Layer Height: We recommend 0.2 for the vast majority of models, moving down to 0.1 when printing smaller pieces like furniture.
Vertical Shells: We have it set at 2, if you do modify it it must be a multiple of your nozzle diameter (in this case the nozzle is 0.4)
Horizontal shells: We find 5 for a top layer is sufficient. Increasing will increase strength but also print time.
Skirt and Brim
We print with a skirt, as the Prusa’s have self-leveling beds.
We try our best to design models that do not need supports, but on the rare occasion that we recommend them these are the settings we use. We generally only recommend Supports Touching Buildplate when you do, but it will be specified on the product page what setting to use.
Overhang Threshold: 55 degrees is the optimal angle to start applying the supports as to not completely encase the model.
Contact Z distance & XY separation: setting the Z distance to 0.1 and separation to 50% will give enough structure to the support contacts without fusing them to the model and making them impossible to remove.
After a layer has been completed or the extruder is traveling it will retract the filament in the nozzle to minimize stringing. No matter what speed you choose for your printers retraction, make sure that ‘wipe while retracting’ is turned on to prevent blobs.
These are the settings that we recommend for setting up your printer.