Abstract: A robotic arm end effector for a laser head coupled to a robotic arm is disclosed. The end effector has a coupler to couple the end effector to the robotic arm and a first actuator assembly coupled to the first coupler. The first actuator has a first drive coupled to the laser cutting head and configured to move the laser cutting head along a first path. The first drive is coupled to a first counter mass and being configured to move the first counter mass along a second path in a direction opposite the first direction. The end effector also has a second actuator assembly coupled to the coupler. The second actuator has a second drive coupled to the laser head which is configured to move the laser head along a third path in a third direction.