Robot simulation device

A robot simulation device for performing a simulation of a plurality of robot programs pertaining to a robot, the robot simulation device comprising:

• a three-dimensional model placement unit configured to place, in a virtual space, one robot model representing the robot in three dimensions;
• a simulation execution unit configured to execute a motion of the one robot model while performing a simulation of at least one robot program included in the plurality of robot programs;
• a motion log storage unit configured to store, as a motion log, positions and orientations of the one robot model at different points in time during the simulation of the at least one robot program for each of the plurality of robot programs;
• and
• a motion log playback unit configured to select at least one of a plurality of the motion logs stored in the motion log storage unit, additionally place a motion log playback-oriented robot model in the virtual space, and execute a motion of the motion log playback-oriented robot model based on the points in time contained in the selected motion log, the motion log playback-oriented robot model representing the robot in three dimensions, wherein
• in a case where the simulation execution unit performs a simulation of the at least one robot program, the at least one robot program after adjustment, or another robot program, the motion log playback unit executes a motion of the motion log playback-oriented robot model by synchronizing points in time during the simulation with the points in time contained in the selected motion log.