The present invention relates to a resolver positioning system for a robot, which system is connectable to a battery supply (402) and is drivable in a pulsed mode. The system comprising: a resolver (32) arranged to detect an axis position of a robot; a first comparator (80, 81) connected to the resolver for reading of a first resolver value from the resolver, wherein the first comparator comprises means (82-87) to provide two different reference levels for the first resolver value; a second comparator (80, 81) connected to the resolver for reading of a second resolver value from the resolver, wherein the second comparator comprises means (82-87) to provide two different reference levels for the second resolver value; and a controller (20) connected to the first and second comparators, wherein the controller is configured to provide a quadrant evaluation of the axis position from the first and second resolver values.