Syed Uzair Ahmad Hazara University, Manshera, Pakistan Selforganizology ISSN 2410-0080 http://www.iaees.org/publications/journals/selforganizology/online-version.asp 2015 2 4 78 90 International Academy of Ecology and Environmental Sciences Hong Kong 1 August 2015 5 September 2015 1 December 2015 Petri Nets 2D 3D sequent calculus. There are many sort of motion in robots structure. Such as the robot locomotion robot jumps robots picking and so on but all are presented through Petri NETS. The one motion which is also the important one and most worthy motion of the robots is the robots arm motion. Which till yet not represented through Petri NETS. In this paper we are going to represent the motion of the robot arm in different angles and different aspect, such as up, down, circular, back and front moment of the robot arm, through Petri net we can present the complex form of motions into simplex paths. DOI 10.0000/issn-2410-0080-selforganizology-2015-v2-0010 http://www.iaees.org/publications/journals/selforganizology/articles/2015-2(4)/robots-arm-motion-representation-in-Petri-NETS.pdf