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Received: 17 April 2019 Accepted: 26 July 2019 In Rapid Prototyping (RP) parts are manufactured layer-upon-layer. The part accuracy primarily influenced by process parameters, material, geometry of parts and types of RP technology used. This work presents the comparative study of dimensional accuracy, form error (roundness, flatness and cylindricity), surface roughness, cost analysis and tolerance grade of a automotive parts (connecting rod) generated through fused deposition modeling system (Ultimaker-2, MakerBot Replector-2) and polyjet 3D printing system (Objet30). CATIA-V6 was used for the 3D modeling and coordinate measuring machine (CMM) was employed for the measurements of dimensions. Optical profilometer was considered to measure the surface roughness of component. ISO UNI EN 20286-I (1995) and DIN 16901 standards was used for the evaluating IT grades for each selected dimension. Total cost of prototype generated by different 3D printers was calculated on the basis of cost of build material, cost of support material, labour cost and machine cost. The results of measurement show that quality of prototype fabricated by Objet30 is better than Ultimaker and MakerBot. Form error and surface roughness of objet30 printer was good enough to produce industrial grade prototype. The novel contribution of this work lies in the fact that no such studies was conducted using complex shape geometry in the archival literature.

Comparative Study and Measurement of Form Errors for the Component Printed by FDM and PolyJet Process