24 lines
1.3 KiB
Markdown
24 lines
1.3 KiB
Markdown
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Large format printers with print volumes in the order of 1m^3 generally use pellets for printing.
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The overall tech is very similar to FDM printing.
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It is FDM printing, but instead of filaments, it uses pellets.
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The difference here is that where filaments have a filament_diameter that is used to calculate
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the volume of filament ingested, pellets have a particular flow_coefficient that is empirically
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devised for that particular pellet.
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pellet_flow_coefficient is basically a measure of the packing density of a particular pellet.
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Shape, material and density of an individual pellet will determine the packing density and
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the only thing that matters for 3d printing is how much of that pellet material is extruded by
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one turn of whatever feeding mehcanism/gear your printer uses. You can emperically derive that
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for your own pellets for a particular printer model.
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We are translating the pellet_flow_coefficient into filament_diameter so that everything works just like it
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does already with very minor adjustments.
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filament_diameter = sqrt( (4 \* pellet_flow_coefficient) / PI )
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sqrt just makes the relationship between flow_coefficient and volume linear.
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higher packing density -> more material extruded by single turn -> higher pellet_flow_coefficient -> treated as if a filament of larger diameter is being used
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All other calculations remain the same for slicing.
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