Hamid Haghshenas Gorgani - Engineering Graphics Center, Sharif University of Technology, Tehran, Iran
Hossein Korani - School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
Reihaneh Jahedan - Mechanical Science & Engineering, Grainger College of Engineering, University of Illinois at Urbana Champaign, USA
Sharif Shabani - Mechanical Engineering Department, Sharif University of Technology, Tehran, Iran

Following the advances in Computer-Aided Design (CAD) and Additive Manufacturing (AM), with regards to the numerous benefits of the Fused Deposition Modeling (FDM) as a popular AM process, resolving its weaknesses has become increasingly important. A serious problem of the FDM is the dimensional error or size difference between the CAD model and the actual ۳D printed part.In this study, the approach is compensating the error regardless of its source. At First, all parameters affecting the dimensional accuracy of FDM are comprehensively identified. Then, multi-input–single-output (MISO) data is prepared by designing experiments using the Taguchi method and obtaining the results from ۳D printed samples. Next, a GMDH neural network is applied, which uses a simple nonlinear regression formula in each neuron but can create very complex neuron combinations. So, it is possible to analyze small or even noisy data. Regulatory parameters of the Neural Net have been optimized to increase efficiency. The case study shows a decrease in the RSME for the Nominal CAD Model from ۰.۳۷۷ to ۰.۰۳۳, displaying the compensator's efficiency.

Additive Manufacturing, Fused Deposition Method, Error Compensation Model, GMDH Neural Network