With SLS, the entire construction volume is heated up to just below the melting temperature of the material (180 degrees Celsius). Once a batch has been exposed, the construction volume is cooled off. This process works from the outside to the inside, so that large temperature differences can arise and the corresponding coefficients of expansion. As a result, the often still plastic workpieces in the construction volume may deform or warp (shrink dimensions). The bigger/thicker walled a component is, the greater the chance of deformation. For larger components that for example have to be smooth, the recommendation is to choose for FDM or SLA technology. Providing it’s not too complex, 3D CNC milling is also a good option.