SeeMeCNC Rostock MAX v2 User Manual page 73

When Avoid Crossing Perimeters is enabled, the nozzle path will not cross a part perimeter
during travel moves. This will help reduce the opportunity for stringing or oozing since the nozzle tip
is rarely over open air. For instance, if the tool path would normally cause the nozzle to travel from
one side of the part to the other, it would cross at least two perimeters and may leave strings of material
in its wake as it moves. If it is set to not cross perimeters, it will cause the nozzle to trace a perimeter
back to the nearest point where it can begin printing again instead of jumping straight across to the new
extrusion position.
Spiral Vase.
Spiral Vase mode allows you to print things like vases or other open top, single-wall objects in
one continuous layer. What happens is that instead of the slicer raising the nozzle up a full layer height
for each new layer, it gradually increases the Z height as the print progresses. This results in a perfectly
seamless object, which can be important for artistic prints such as vases. When you're printing a vase
or similar object, you'll want to make sure that you set the top layer count to zero to prevent the vase
getting a "lid" that you'll have to cut off.
By default, objects are printed from the inside features to the outside. If you want to reverse
this process, enable External Perimeters First. This will cause the outside of the model to be printed
before the interior features.
The Top and Bottom solid layer parameters dictate how thick the top and bottom surfaces of
your object are when printed. These two parameters fulfill essentially the same function as the
Perimeters parameter, but for the top and bottom of the part. You can calculate your top & bottom
thickness by multiplying the solid layer count by the layer height. For example, 5 top layers will result
in a final top thickness of 1mm if your layer height is 0.2mm. You also have the option of specifying
the top and bottom thickness in millimeters instead of layers.
Rostock MAX v2 User's Guide
Avoid Crossing Perimeters.
External Perimeters First.
Top & Bottom solid layers.
8 – Advanced MatterControl: Settings – General - 73