Date of download: 10/26/2017 Copyright © ASME. All rights reserved. From: Printing Three-Dimensional Electrical Traces in Additive Manufactured Parts for Injection of Low Melting Temperature Metals J. Mechanisms Robotics. 2015;7(2):021004-021004-10. doi:10.1115/1.4029435 Figure Legend: The branching test piece and visual tracking of fluid advancement through background image subtraction using a visible light camera: (a) the branching test piece where the diameter of the channels in each of the four branches can be varied and (b)–(d) the advancing liquid metal for a single injection at three different times