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Axis Servo Drive – NSK ESA-Y3040TF1-20

The ESA-Y3040TF1-20 is an electronic servo drive for CNC axis control (“Electronic Servo Amplifier”), manufactured by NSK (Nippon Seiko K.K.) and belonging to the ESA series. The series code Y3040TF1 identifies the power configuration and integrated input filter; the suffix -20 indicates the supply voltage class (200 V AC three-phase). The module manages the current and speed regulation loops of the axis servo motor, interfacing with the CNC system via analogue reference or serial bus. Variants may exist with different peak current ratings, feedback type (encoder/resolver), or digital interface level.

The servo drive is the core of axis control: it receives the position or speed reference from the CNC controller, closes the current loop on the servo motor, and guarantees accurate contouring fidelity throughout the machining cycle. A failure in this module causes total loss of control of the affected axis, resulting in an immediate machine stop and inability to run any work cycle, with consequent production downtime and a risk of dimensional scrap if the fault occurs mid-operation.

NSK Ltd. (Nippon Seiko K.K.) is a Japanese multinational founded in 1916 and a world leader in the manufacture of precision ball and roller bearings. Over the decades the company expanded its portfolio to include linear motion systems (ball screws, linear guides) and electronic components for precision machine tools, including servo drives from the ESA series. Products in this family are legacy / discontinued: mainly available as used parts, NOS surplus, or through specialist repair centres.

Main Technical Specifications