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Does anyone knows which is the formula that 3D Hub uses to calculate the price ?.

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The formula is based off your startup costs plus the price per mm for the model.

Do you mean the volume calculated formula? If so - that is based off Cura’s basic slicing formula to get volume of plastic used - roughly 0.4mm nozzle, 1 perimeter, 20% infill. Your slicer (e.g. Cura) works out the amount of material needed to print the model at that spec, and then that is turned into a cost based on volume price of the material. If you increase the infill say to 40%+ you need to manually work out the new volume of material needed to complete the job.

Does that help?

Steve

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I think its volume, no raft, supports and 10% infill

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OK - for that you will need to set the object up as you want it to be printed in your slicer - set your slicer to 10% infill, add raft etc etc. When sliced your slicing software will show you either how much filament length will be needed, or the actual fully sliced material volume. If your slicer gives you the total material volume in cm^3 then that is what your figure - it should be similar to what is seen in the “Sliced Volume” figure in the order list of the shape. More infill, more support, more perimeters the more filament and hence the more sliced volume then what 3D Hubs quotes, and obviously the other way gives you less volume of material. You can edit this figure with your own worked out one and the price will change if you click out of the box.

If your slicer doesn’t give you the filament material volume total, but filament used or filament length - you need to use this formula to work out filament volume:

Volume of Filament Needed in cm^3 =((Filament Diameter (mm)/2)^2*Pi*Filament Length Used (mm))/1000

Hope that helps

Steve

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Sorry - thought you were the OP! The default infill for 3DHubs is 20%,

Steve

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Thanks, they calculate 25% infill and 0.8 wall thickness

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It´s 25%

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Thank you.

Looking well and making some calculations, 3D Hub Marvin volume 2.5 cm is 2.4 cm3, 5 cm is 14 cm3 and 10 cm is 92 cm3.

Neither Cura , UP Plus or my Catalyst ( stratasys ) gives me that Volumes for Marvin and of course Catalyst gives me a higher value because it always create support. But any way it gives me a pretty higher close value.

I took a look well at the info when you set price for a specific filament and it is calculated with a 25% infill and 0.8 wall thickness.

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