EVEN PRECISION BALANCE BASED ON THEORY OF ELECTROMAGNETIC COMPENSATION FOR FORCE

PURPOSE: To reduce weight by forming the ingot of die cast aluminum in a framework structure formed, for example, by through holes. CONSTITUTION: A system carrier 1, guides 4 and 5, and a weight receptor 2 are constituted as a one-piece cast and force corresponding to the mass of an object to be measured is transferred to a relatively short lever arm of a driving lever 3 via a connection element 3 from the weight receptor 2. Then, a coil SP of an electromagnetic type force compensator M is sealed to the relatively long lever arm of the lever 3 to compensate for force electromagnetically. For example, system bases 15 and 18 of the system carrier 1 are made of die cast aluminum in framework structure with, for example, a pocket or a bag-hole-shaped opening 16' for reducing weight, thus preventing twist stiffness against the eccentricity force that operates on the weight receptor 2 from decreasing.