Product Description:

The KDA 3.2-050-3-LY0-U1 is a spindle drive produced by Bosch Rexroth Indramat for the KDA Spindle Drives series. It forms the power stage between a DC supply module and a high-speed machine tool spindle, letting a CNC controller modulate torque and speed with precise electronic feedback. By generating three-phase output from a fixed DC link, the drive supports rapid acceleration and deceleration during milling, drilling, or grinding cycles. This control behavior helps the spindle follow changing speed commands during cutting and positioning sequences.

The unit operates from a link circuit rated at 300 VDC, so it must be paired with a compatible upstream supply module. It delivers a continuous motor current of 50 A, and cabinet ventilation must dissipate the resulting heat load. Cooling is provided by a mounted heatsink blower whose motor draws 115 V/50–60 Hz single-phase power, so a dedicated auxiliary outlet is required. The single-phase blower supply is separate from the DC link that powers the motor output stage. Forced airflow keeps internal components within the permitted ambient range of 5 to 45 °C during continuous operation. Installation height is limited to 1000 m above sea level because thinner air at greater elevations reduces convective heat transfer and would require derating. Velocity references arrive as digital telegrams on a SERCOS fiber-optic ring, allowing the drive to join synchronized multi-axis networks without separate analog wiring.

The controller includes a second encoder input and synchronous input, enabling dual-loop feedback for spindle orientation or tandem-motor operation. This arrangement can support spindle orientation tasks and applications where synchronized operation depends on separate feedback paths. The drive is in Series 3 with Series Version 2. It has no additional interface option, so diagnostics, parameter settings, and real-time commands pass through the primary SERCOS channel.