MANUFACTURING – 3D PRINTING (L / METAL / BINDER JET) CALCULATOR
Sls Shrinkage Compensation
A precise tool.
What is the Sls Shrinkage Compensation & How does it work?
Selective Laser Sintering (SLS) parts typically shrink as they cool, because the nylon powder contracts and the sintered polymer densifies. Understanding this behavior is essential for designing parts that meet final dimensional tolerances.
The shrinkage is usually expressed as a percentage of the original dimension and varies with material batch, build temperature, and part geometry. By quantifying the shrinkage factor, engineers can predict the final size of a printed component.
Compensation is applied by scaling the CAD model before printing. The relationship between measured dimension (D_meas), shrinkage factor (Ξ±), and compensated dimension (D_comp) is captured in the formula below.
D_{comp}=\frac{D_{meas}}{1-\alpha}
\alpha = shrinkage factor (decimal)
Parameters
Result
β
Frequently Asked Questions
How do I calculate SLS shrinkage?
Multiply the original dimension by the shrinkage factor to get the final size.
What affects SLS shrinkage?
Material batch, build temperature, and part geometry all influence SLS shrinkage.
How can I reduce SLS shrinkage?
Optimize build parameters like temperature and support structure to minimize shrinkage.
What is the typical range of SLS shrinkage?
SLS shrinkage typically ranges from 0.5% to 1.5%, depending on material and process conditions.
Why is SLS shrinkage compensation important?
It ensures that final parts meet dimensional tolerances, improving fit and function.
Can I use this calculator for all SLS materials?
The calculator is generally applicable but may require adjustments for specific material properties.
How accurate is the shrinkage compensation prediction?
Accuracy depends on precise input data and calibration with actual build results.
Results are for informational purposes only and do not constitute professional advice.