Material Pricing Scripts based on Material Cost
- Felix Bauer
- Dennis Hezel
- Brian Crotty (Unlicensed)
This page contains a listing of available variables under Materials pricing and sample pricing scripts for different technologies.
For a general overview of how Pricing Scripts work, read https://3yourmind.atlassian.net/wiki/spaces/PD/pages/87916845.
Pricing to Capture Material Cost
The material is used to print both the part itself and support structures underneath it (when necessary). In case of some of the technologies, the inside of the part will not be filled with the material completely, but instead there will be a repetitive infill structure which will also be included in the material cost calculation.
General Form for Material Pricing Scripts
The basic form that we recommend for the Javascript code for calculating the material-related cost is:
let materialPrice = ; // $/kg or €/kg
let materialDensity = ; // g/cm^3
let supportPrice = ; // $/kg or €/kg
let supportDensity = ; // g/cm^3
let infill = ; // number in [0,1]
let supportInfill = ; // number in [0,1]
let wallThickness = ; // mm
let materialUsed = Math.max((model.volume - model.area*wallThickness)*infill, 0) +
Math.min(model.area*wallThickness, model.volume);
let totalMaterialPrice = (materialUsed*materialDensity*materialPrice +
support.volume*supportPrice*supportDensity*supportInfill)*0.000001;
totalMaterialPrice;Each variable can then be defined with a constant value or mathematical calculation using available variables from the 3YOURMIND model analysis (next section).
Technologies without Walls (SLS; DMLS, MJF)
If there is no wall, one needs to simply put wallThickness = 0 (for example, in SLS, DMLS and MJF all parts are 100% filled with material, hence there is no need to introduce the wallThickness variable).
Technologies without Support
If there are no support structures, one can either remove all variables containing the word "support" from the formula, or simply put supportInfill = 0.
Variables Defined by 3YOURMIND Model Analysis for Material Pricing
This listing are all variables that are derived from each uploaded 3D model.
Variable | Description |
|---|---|
| Volume of the 3D model in mm3 |
| Area of the 3D model in mm2 |
| Height of the 3D model in mm |
| Width of the 3D model in mm |
| Depth of the 3D model in mm |
| Number of separated shells in 3D model |
| Bounding box volume of the 3D model in mm3 |
| Convex hull volume of the model in mm3 |
| Concave hull volume of the model in mm3, calculated with a max edge length of 55mm |
| Volume of the solid support structures in mm3 |
| Area of the model connected to support structures in mm2 |
| Quantity of the same geometry in the basket. |
User Properties | See the variable listing under https://3yourmind.atlassian.net/wiki/spaces/PD/pages/87982464 |
Sample Material Pricing Scripts
This section contains sample scripts based on specific technologies and materials.
These pricing scripts can be copied directly into the platform and the variables can be adjusted according to your specific workflow and pricing.
FDM (ABS)
//Variables starting with keyword "let" are adjustable by customers
//Material cost
const materialPrice = 70 // € or $
const materialDensity = 1.29 // g/cm^3
const supportPrice = 30 // €/kg or $/kg
const supportDensity = 1.29 // g/cm^3
const infill = 0.7 // number in [0,1]
const supportInfill = 0.3 // number in [0,1]
const wallThickness = 1 // mm
const partVolume = model.volume;
const surfaceArea = model.area;
const supportVolume = support.volume;
const materialUsedInfill = Math.max((partVolume - surfaceArea * wallThickness) * infill, 0)
const materialUsedContour = Math.min(surfaceArea * wallThickness, partVolume)
const materialUsed = materialUsedInfill + materialUsedContour
const totalMaterialPrice =
(materialUsed * materialDensity * materialPrice +
supportVolume * supportPrice * supportDensity * supportInfill) *
0.000001
// final unit price
const margin = 3;
let price = totalMaterialPrice * margin;
price;
SLS (PA12)
//Variables starting with keyword "let" are adjustable by customers
let maxVolume = 380 * 284 * 380; // dimensions of the printer
let materialCost = 60; // euro/kg
let density = 1.02; // g/cm^3
let machineRate = 50; // euro/hour
let maxPrintTime = 14; // printing time of a full building chamber
let margin = 5; // total price is multiplied with margin
// Price calculation
let material = model.volume * materialCost * density * 0.000001;
let time = (model.convex_hull_volume * maxPrintTime) / maxVolume;
let price = margin * (material + time * machineRate);
// Last line must contain final price
price;
SLA (Accura ClearVue)