Tachogenerator

Specialized repair of DC and AC tachogenerators used as speed-to-voltage converters in older speed control systems and some modern drives. The process includes replacement of worn brushes, turning and polishing of the commutator, restoration of armature and stator windings, fixing short circuits or open circuits in windings and recalibration of the output voltage to speed ratio. Common faults include output voltage fluctuation due to incomplete brush contact, electrical noise from damaged commutator, reduced sensitivity and bearing damage. These services are essential to maintain precise performance of speed control systems in industrial machinery, rolling mills and legacy equipment that still rely on analog feedback.