Investigation of Optimal Proses Parameters in CNC Milling of Insole Shoe Orthotic using Taguchi - Fuzzy Approach

The surface quality and processing time for insole shoe orthotic (iso) made from EVA rubber foam (erf) is highly dependent on the input machining strategies during a CNC milling process. This paper aims to clarify the application of Fuzzy Logic integrated with the Taguchi method to minimize the surface roughness and maximize Material Removal Rate (MaRR) that for iso product with erf based on CNC Rolland Modella machines. In this research, the input parameters specified are feed, DOC, and the composition of erf. In Taguchi method, orthogonal array design L824 which consists of three factors and mix level and S/N will be calculated. S/N ratio of roughness and MaRR will be entered into the system of fuzzy logic and output received is multi response performance index (MRPI) with application ANOVA, DOC and feeds. Based on the result, it can be concluded that the optimal level for Erf is level 2 (3rd Slice), feed is level 2 (2000 mm/min) and DOC is level 1 (2.5 mm) with the Ra=9.679 μm and MaRR=61,200,000 mm3/min.