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HEIDENHAIN Servo Drive
Brand: HEIDENHAIN -
Cat: Servo Drive
Code:UE 211B
| Combination name | Availability | Price |
|---|---|---|
Servo Axis Drive Module – HEIDENHAIN UE 211B
The UE 211B is a servo axis drive module (“Servo Axis Drive Module”) manufactured by HEIDENHAIN, belonging to the family of compact drive units designed for use with HEIDENHAIN TNC CNC controls (documented on TNC 155, TNC 355 systems and compatible variants). The module manages the current and speed regulation of a machine axis servo motor, interfacing with the CNC unit via HEIDENHAIN’s proprietary bus. The designation UE 211B identifies revision B of the 211 series; the unit is typically mounted inside the control cabinet or the machine’s drive assembly.
The servo axis drive module is the component that converts position and speed references from the CNC into drive current for the servo motor: it closes the current loop and contributes to the speed loop, ensuring the dynamic response required for precision machining. If it fails, the controlled axis becomes inoperative and the machine cannot perform any operations; replacement with an identical unit is often the only rapid solution, as these modules are not interchangeable with units of different series.
HEIDENHAIN is a German family-owned company founded in 1889, headquartered in Traunreut (Bavaria), and a world leader in the manufacture of linear and angular measurement systems, rotary encoders, and high-precision CNC controls for machine tools. The UE series modules belong to a legacy generation of drives: legacy / discontinued, available exclusively through the used market, industrial surplus, or specialist repair services.
Main Technical Specifications
| Type | Servo axis drive module |
| Part number | UE 211B (UE211B) |
| Brand | HEIDENHAIN |
| Known application | CNC machine tools with HEIDENHAIN TNC control (TNC 155, TNC 355 and compatible variants) |
| Function | Servo motor current and speed regulation for axis drive |
| Supply | ~24 V DC logic; DC bus from centralised power supply module |
| Rated power | ~1–3 kW |
| Interfaces | Proprietary HEIDENHAIN bus; multi-pin connectors for motor and encoder feedback signals |
| Weight | ~0.8–2.0 kg |
| Dimensions | ~200–300 × 100–150 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
