Product Description:

The KDA 3.1-050-3-LY0-U1 spindle drive belongs to the KDA Spindle Drives series manufactured by Bosch Rexroth Indramat and is part of Series 3 in that family. It is engineered to regulate high-speed machine-tool spindles by converting the shared DC bus power into precisely metered three-phase output, allowing consistent cutting or grinding speeds under numeric control. In an automation lineup, the unit links the motion controller to the electromechanical spindle and executes velocity commands while monitoring real-time feedback. This operating role suits machine tools that need stable spindle response during changing process loads.

Electrically, the drive is supplied from a common bus at 300 VDC and can furnish up to 50 A of continuous armature current, giving the spindle ample torque during acceleration and load changes. The heatsink blower is powered by an auxiliary line of 115 V, 50/60 Hz, and cooling is provided by a mounted heatsink blower, so internal components stay within their thermal limits during prolonged duty cycles. Speed references and diagnostics are exchanged over the digital SERCOS interface, so parameter sets, fault codes, and actual values reach the controller at deterministic intervals without analog drift. The digital link also supports repeatable command transfer in systems that require consistent spindle behavior across varying operating states.

Proper installation conditions include an ambient range of 5 to 45 °C and a mounting height not exceeding 1000 m above sea level, which helps maintain adequate air density for heat removal. Position monitoring can be expanded through a second encoder input and synchronous input, making it possible to process an auxiliary feedback device for phase-locked machining strategies. This arrangement supports applications that require synchronized motion between the spindle and another axis. The drive has no additional interface installed, so no extra fieldbus or I/O piggyback cards are included.