PROBLEM TO BE SOLVED: To provide an off-line programming system allowing for a simulation that operates similarly to an actual machine.;SOLUTION: A robot off-line programming system 28 includes: a second communication module 30, connected to a first communication module 26 of an NC simulator 10 through a communication line 24, for communicating information, such as signals, with the first communication module 26; a robot simulation device or robot simulator 32 for running a simulation of a robot based on the information; and a program generation device 34 for generating a teaching program off-line by using a result of the simulation by the robot simulator 32. The robot simulator 32 stores data representing a three-dimensional CAD model and specification for a simulation target.;COPYRIGHT: (C)2010,JPO&INPIT
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