The present disclosure is related to an exemplary robot manipulator system having a robot manipulator with a kinematic chain of stiff robot manipulator segments, which are linked together by hinged joints. A robot controller controls execution of a robot program. At least one temperature sensor provides measured temperature values. At least one heatable cover is attached onto at least one manipulator segment for applying heat energy thereon, with an amount of heat energy being controlled dependent on measured temperature values of the at least one temperature sensor.