The present invention relates to a balanced support device, comprising: -a wagon configured to move along a wagon rail, -a frame connected to the wagon and extending over a vertical distance from the wagon, -a rail connected to the frame and a carriage (61) movably arranged on said rail, -at least one protruding arm (60) comprising a support member (18) for supporting amass(12), wherein the protruding arm is pivotably connected to the carriage, wherein the protruding arm comprises multiple segments (66, 68) which are movable relative to one another in order to allow the support member to move toward and away from the frame, wherein the support member (18) is mounted to the protruding arm (60) via a rotary connection (110a), allowing the support member including a mass (12) to be rotated, and a vertical balance system for exerting an upwards force on the carriage for counteracting a weight of the mass, the arm and the carriage,wherein the vertical balance system is constructed and arranged to control said force in order to balance masses of different weights.