A method of manufacturing a carcass structure for vehicle tires includes preparing strip sections, each comprising longitudinal and parallel thread elements coated at least partly with at least one layer of raw elastomer material. Entries of a first defect table are sorted according to the type of track layout, or zones. A throttle opening degree setting section sets a throttle opening degree based on the engine speed and the engine required torque and outputs a signal corresponding to the throttle opening degree to a throttle motor. A resistor circuit connects the base and the collector of the transistor. The polishing pad drum, the platen, or both the polishing pad drum and the platen are adapted to be linearly moved to polish the surface of the wafer using the rotating polishing pad drum.