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research-article

Algorithm to Reduce Leading and Lagging in Conformal Direct-Print

[+] Author and Article Information
Morteza Vatani

Department of Mechanical Engineering, The University of Akron, 244 Sumner Street, Akron, OH
mv35@zips.uakron.edu

Faez Alkadi

Department of Mechanical Engineering, The University of Akron, 244 Sumner Street, Akron, OH
faa23@zips.uakron.edu

Jae-Won Choi

ASME Membership Department of Mechanical Engineering, The University of Akron, 244 Sumner Street, Akron, OH
jchoi1@uakron.edu

1Corresponding author.

ASME doi:10.1115/1.4040730 History: Received February 12, 2018; Revised June 22, 2018

Abstract

A novel additive manufacturing (AM) algorithm was developed to increase the consistency of 3D printed curvilinear or conformal patterns on freeform surfaces. The algorithm dynamically and locally compensates the nozzle location with respect to the pattern geometry, motion direction, and topology of the substrate to minimize lagging or leading during conformal printing. The printing algorithm was implemented in an existing 3D printing system that consists of an extrusion-based dispensing module and an XYZ-stage. A dispensing head is fixed on a Z-axis and moves vertically, while the substrate is installed on an XY-stage and moves in the x-y plane. The printing algorithm approximates the printed pattern using non-uniform rational B-spline (NURBS) curves translated directly from a 3D model. Results showed that the proposed printing algorithm increases the consistency in the width of the printed patterns. It is envisioned that the proposed algorithm can facilitate non-planar 3D printing using common and commercially available Cartesian-type 3D printing systems.

Copyright (c) 2018 by ASME
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