Additive manufacturing or 3D printing is used at the Department of Mathematics and Systems Analysis, Aalto university to manufacture components for acoustic measurement devices. It has been observed, that the shape of the 3D printed components is often different to the original-CAD model. This is especially true when small objects are manufactured using high manufacturing speeds. This thesis focuses on modeling inaccuracies of 3D printed objects. The print head motion is modeled by employing model similar to damped harmonic oscillator. The model parameters are found using least squares method from hollow cylindrical pieces. Analysis of G-code from the experiment gives a way to parse how the test pieces should be, while pictures of the pieces tell us the real shape. A relation is formed between the two sources of data.
