HEIDENHAIN Servo Drive

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Servo Drive Module – HEIDENHAIN UM 114D

The UM 114D is an electronic servo drive module (“Servo Drive Module”) manufactured by HEIDENHAIN, designed to regulate axes or spindle within HEIDENHAIN CNC systems. It belongs to the family of power electronics modules used to drive and regulate servo motors (brushless and DC) within the CNC automation chain, interfacing with the main control unit via the proprietary HEIDENHAIN bus. The suffix D identifies a specific variant (e.g. rated voltage configuration or connector layout); the component may be present in different hardware revisions.

The drive module is the core of the axis regulation loop: it receives the position or speed reference from the numerical control and generates the drive current for the servo motor, ensuring positioning accuracy and stable dynamic response during machining. Without it the controlled axis is completely inert and the machine cannot execute any cycle; a fault typically manifests as position alarms, axis drifting, or immediate CNC program halt.

HEIDENHAIN (Dr. Johannes Heidenhain GmbH) is a German company founded in 1948 in Traunreut (Bavaria), a world leader in the production of high-precision linear and rotary measurement systems, TNC numerical controls, and drive modules for precision machine tools. The company remains privately and family-owned. Products in the UM series are legacy / discontinued: available exclusively as used, NOS (new old stock) or through specialist repair.

Main Technical Specifications