Adding pellet printer suppor to OrcaSlicer

[vipulrajan]

Large format printers with print volumes in the order of 1m³ generally use pellets for printing. The overall tech is very similar to FDM printing. It is FDM printing, but instead of filaments, it uses pellets.

The difference here is that where filaments have a filament_diameter that is used to calculate the volume of filament ingested, pellets have a particular flow_coefficient that is empirically devised for that particular pellet.

We are translating the flow_coefficient into filament_diameter so that everything works just like it does already with very minor adjustments.

filament_diameter = sqrt( (4 * flow_coefficient) / PI )

sqrt just makes the relationship between flow_coefficient and volume linear.

This will allow a lot of accessibility for an increasing market of pellet 3d printers. Ginger additives, Colossus and CEAD being some of the leading names.