Product Description:

The KDA 2.1-100-3-D0I-U1 spindle drive is manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. As a controller for high-speed spindle motors, it links the numerical control system to the electromechanical load, converting bus power into a regulated three-phase output while supervising feedback signals. The housing is sized for cabinet installation alongside other KDA modules, which supports common DC bus layouts and helps keep machine-tool wiring compact. This arrangement is well suited to equipment that requires stable spindle regulation during continuous speed changes, rapid acceleration, and repeated load variation.

The drive accepts a DC bus of 300 VDC and can deliver up to 100 A of continuous output current to the spindle windings. A dedicated heat sink blower operates from an auxiliary source rated at 115 V/50–60 Hz, which helps prevent thermal saturation during prolonged high-load cycles. Heat is removed by a mounted heat sink blower, and overall thermal management uses forced cooling to move air across the power section. This cooling method supports steady operation during demanding spindle duty, especially when the process places abrupt torque demands on the motor or requires long periods of sustained output.

The permissible ambient range is 5 to 45 °C, and the unit can operate at elevations up to 1000 m above sea level. For position-synchronized machining, the controller provides an incremental encoder output that relays real-time spindle position to the CNC. Velocity reference data is accepted as a digital 16-bit parallel word, which helps reduce analog drift and keeps command transfer consistent. These interface functions support timing-sensitive spindle control in applications such as threading, contouring, and other operations that depend on accurate coordination between spindle motion and axis movement.