Originality/value – The enhanced results show the advantages of this method in comparison with the previous calibration methods. Findings – Experimental results obtained when applying the calibration procedure on a Hexa parallel robot show that vision‐based kinematic calibration yields enhanced and efficient positioning accuracy. After successful calibration and addition of an appropriate control scheme, the robot has been considered as a color‐painting prototype robot to serve in relevant industries. Experimental results obtained when applying the calibration procedure on a Hexa parallel robot show that vision‐based kinematic calibration yields enhanced and efficient positioning accuracy. To carry out the calibration procedure, several trajectories are run (the results of two of them are presented here) and sufficient specifications of the poses (positions/orientations) are calculated to find the kinematic parameters of the robot. The parallel structure robot with 6-DOF HEXA has found use in high-end systems when multiple degrees of freedom and large workspace are required. The chess pattern makes image corner detection very straightforward this detection leads to finding the camera and then the kinematic parameters. Intrinsic and extrinsic parameters and the distortion coefficients are found by an offline minimization algorithm. For camera modeling, a pinhole model is used it is then modified by considering some distortion coefficients. Design/methodology/approach – The setup of the proposed method is very simple only one USB camera connected to a laptop computer is needed and no contact with the robot is necessary during the calibration procedure. Such an approach avoids using any internal sensors or complex three‐dimensional measurement systems to obtain the pose (position/orientation) of the robot's end‐effector or the joint coordinates. Plus, with HEXA you can create the applications you’ve been dreaming of. ![]() ![]() It is easy to control with your mobile devices - it can walk and climb, take photos and videos, check your backyards and dance to the beat You can connect HEXA at anywhere with its own WiFi. Purpose – The purpose of this paper is to present a vision‐based method for the kinematic calibration of a six‐degrees‐of‐freedom parallel robot named Hexa using only one Universal Serial Bus (USB) camera and a chess pattern installed on the robot's mobile platform. Meet HEXA, a multi-functional all terrain robot. ![]() Vision‐based calibration of a Hexa parallel robot Vision‐based calibration of a Hexa parallel robot
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