... standard products with diameters of 20 and 25 millimeters. They achieve an efficiency of 90 %. Minor adjustments were made to modify them for the extremely harsh conditions on Mars. The equipment has to withstand the large temperature differences on the surface of Mars from minus 120 to plus 25 °C, the vibrations and the special atmosphere. The precision motors are used to drive the robot arms, for the rock drill, for the control mechanism and operation of the cameras as well as for ...