The Kübler Sendix Rotary Encoder delivers high-resolution shaft position tracking, extreme mechanical resilience, and deterministic fieldbus feedback engineered specifically for heavy-duty material handling cranes, automated packaging machines, wind turbines, and multi-axis CNC machine tooling.

Heavy-Duty Motion Feedback with the Kübler Sendix Rotary Encoder

Widely recognized across factory automation and heavy process industries, the Kübler Sendix Rotary Encoder provides dependable angular displacement, positioning, and speed measurement under challenging plant conditions. Engineered to eliminate bearing failures caused by mechanical installation misalignment or continuous high shaft loads, the encoder integrates Kübler’s patented Safety-Lock™ design. This construction mechanically decouples the sensitive optoelectronic scanning disk from the external shaft bearings, preventing glass disk fractures and internal bearing race separation during severe shock loads.

The Sendix platform spans both incremental pulse generation and absolute multi-turn position sensing across solid-shaft, hollow-shaft, and blind-hole configurations. Equipped with magnetic gear technology or optical scanning systems, absolute variants maintain true shaft multi-turn position during total power interruptions without relying on maintenance-prone internal buffer batteries. Encased in rugged die-cast aluminum or corrosion-resistant stainless steel housings, the assembly achieves up to IP67 and IP69K ingress ratings, ensuring operational continuity in harsh environments subject to continuous moisture, abrasive dust, and wide ambient temperature swings.

Key Features and Engineering Advantages

• Patented Safety-Lock™ Architecture: Interlocked bearing structure absorbs high radial and axial forces, ensuring reliable operation up to 12,000 RPM.
• Battery-Free Multi-Turn Tracking: Mechanical gear-train multi-turn technology guarantees accurate absolute position retention through extended power shutoffs.
• Versatile Output Topologies: Offers RS-422 (TTL), push-pull (HTL), SSI, BiSS-C, and industrial Ethernet protocols including PROFINET, EtherNet/IP, and CANopen.
• High Optical and Magnetic Precision: Resolves incremental pulse counts up to 36,000 PPR or absolute resolutions up to 36 bits for sub-millimeter motion loops.
• Harsh Environment Resilience: Die-cast aluminum or V4A stainless steel casing rated to IP67 and IP69K resists chemical washdowns, vibration, and salt mist.

Technical Specifications

Industrial Applications and Process Integration

The Kübler Sendix Rotary Encoder provides high-reliability angular and velocity tracking across heavy machinery and high-speed motion axes, including:

• Overhead gantry cranes, container spreaders, and automated hoist drum rotation monitoring.
• High-speed packaging cartoners, continuous web winding tables, and label applicator synchronization.
• Wind turbine pitch and yaw position regulation and nacelle orientation systems.
• CNC machine tool feed axes, automatic tool changers, and rotary milling tables.

Frequently Asked Questions

What is the benefit of the Safety-Lock™ bearing design in the Kübler Sendix Rotary Encoder?
Standard encoders can experience bearing drift and disc cracking if the shaft is subjected to high axial shocks or thermal expansion. The Safety-Lock™ bearing design locks the bearing races firmly into the flange housing, mechanically isolating the optoelectronic disc from shaft runout and thermal expansion forces.

How do absolute Sendix multi-turn encoders retain position without a battery?
Sendix absolute multi-turn encoders use an internal high-durability mechanical gear train or magnetic energy-harvesting tracking circuit. When power is lost, physical shaft rotations continue to drive the gear stages mechanically, ensuring that the exact multi-turn count is instantly available when power returns without any battery maintenance or reference homing cycles.

Can the encoder withstand outdoor and marine installations?
Yes. With an ingress protection rating up to IP67/IP69K, wide temperature resilience down to -40 °C, and optional V4A stainless steel casing with seawater-resistant seals, the Sendix series is engineered to operate in outdoor ports, marine winches, and mobile construction machinery.