LTI Motion CDE32.003.C3.0 Servo Positioning Controller
The LTI Motion CDE32.003.C3.0 is a servo drive positioning controller from the CDE32 series, a product family developed by LUST Antriebstechnik and later marketed under the LTi Motion and LTi Drives names. The unit is rated at approximately 0.95 kVA, placing it in the compact power class where precise control, small dimensions and straightforward integration matter more than raw output. The CDE32.003.C3.0 designation identifies the power rating, the hardware configuration code C3.0 and the control variant fitted at the factory.
The CDE32 series was designed for applications that require accurate positioning rather than extreme dynamic performance. Typical uses include feed axes on small machine tools, positioning tables, indexing units, feed rollers and auxiliary axes in packaging and handling machinery. In these roles the drive must deliver repeatable motion, stable low speed behavior and reliable operation over long production cycles.
Product Overview
The CDE32.003.C3.0 operates as a single axis servo controller with integrated positioning functionality. It converts the mains supply into a controlled output that drives a servo motor, and it executes current, velocity and position control loops internally. The position loop can be configured to accept command values from a higher level controller over a fieldbus, or from a pulse and direction interface, depending on the configuration. This allows the drive to function either as a simple slave axis or as a more autonomous positioning unit.
The power stage uses pulse width modulation with a high switching frequency, which produces smooth current waveforms, low torque ripple and quiet motor operation. The control core runs the current loop at a short cycle time to provide fast torque response, while the velocity and position loops are tuned to match the mechanical characteristics of the load. Because the drive is compact, several units can be mounted side by side in a control cabinet, which suits multi axis machines with limited panel space.
Key Features and Functional Highlights
Feedback support includes resolver, incremental encoder and absolute encoder interfaces, depending on the configuration code. Automatic commutation detection reduces commissioning effort when the motor and drive are paired for the first time. Parameter sets can be stored internally and transferred between units, which simplifies machine replication and spare parts handling.
Integrated monitoring functions continuously evaluate current, voltage, temperature and following error. When a limit is exceeded, the drive triggers a defined fault response and disables the output stage, protecting the motor and the mechanical system. Braking energy generated during deceleration can be dissipated through an external braking resistor connected to the DC link, allowing moderate inertia loads to be stopped quickly without overvoltage trips.
Digital and analog inputs and outputs provide fast interfacing with machine signals such as enable, limit switches, reference pulses and brake control. A motor holding brake output is available for vertical axes. The unit is protected against overcurrent, overvoltage, undervoltage and overtemperature conditions, and it includes an electronic motor overload model that estimates winding temperature without additional sensors.
Technical Specifications
The CDE32.003.C3.0 is rated at approximately 0.95 kVA, which corresponds to a compact power stage suitable for small and medium sized servo motors. The output frequency range extends across a wide band, supporting both standard servo motors and higher speed applications. The DC link is accessible for shared operation, allowing several drives to be connected to a common DC bus so that braking energy from one axis can be reused by another.
Communication with the higher level controller is handled through a fieldbus interface or through conventional analog and digital signals, depending on the configuration. Supported fieldbus protocols across the platform include CANopen, PROFIBUS, EtherCAT and others. This flexibility allows the drive to be used both in centralized motion architectures, where a central controller issues position commands, and in decentralized architectures, where the drive performs positioning tasks locally.
Performance and Advantages
Short current loop cycle times produce fast response to torque commands and minimize following error during positioning moves. This is particularly valuable in applications involving frequent start stop cycles or tight positioning tolerances. The velocity loop can be tuned with adjustable gain, integral time and filter settings, so that resonance in the mechanical train can be suppressed without sacrificing bandwidth.
Because the drive supports both rotary and linear motors, it can be applied to direct drive axes as well as conventional geared arrangements. This versatility reduces the number of different drive types a machine builder needs to stock and maintain. The modular configuration coding system means that a single base platform can be adapted to different feedback types and fieldbus systems by selecting the appropriate ordering code.
Application Areas
The CDE32.003.C3.0 is used in a variety of industrial machines. In machine tool applications it drives feed axes, tool changers and auxiliary positioning units. In packaging machinery it controls film feed, cutting and sealing axes where repeatable positioning is essential. Printing and paper converting equipment uses the drive for register control and tension regulation. Handling and robotics systems employ it for pick and place, gantry and rotary indexing tasks. Textile, plastics and woodworking machinery also rely on this drive family for accurate speed and position control.
Installation and Commissioning
Installation begins with verifying the mains voltage, the motor rating and the feedback type. The drive must be mounted vertically with sufficient clearance above and below to allow convection cooling. Shielding of the motor cable is essential for electromagnetic compatibility, and the shield should be bonded to the cabinet ground at both ends using a large contact area. Motor and feedback cables should be routed separately from mains and signal cables to reduce interference.
Commissioning typically starts with entering the motor data, either manually or by selecting a stored motor dataset. The feedback system is then checked for correct direction and resolution. After the current loop is verified, the velocity and position loops are tuned using step response tests or automatic tuning routines. Finally, the fieldbus parameters, limit values and fault responses are configured and stored in non volatile memory.
Maintenance and Diagnostics
The drive includes a diagnostic memory that records fault codes, operating hours and critical parameter values at the moment of a trip. This information is valuable when tracing intermittent problems. Regular maintenance consists of checking cabinet cooling, verifying terminal torque, inspecting cable shields and clearing dust from heatsink fins. Fan units, where fitted, should be replaced according to the recommended service interval.
System Integration and Compatibility
The CDE32.003.C3.0 integrates into automation systems through its fieldbus interface or through conventional analog and digital signals. It can be combined with other drives in the same family on a shared DC bus, and it supports master slave torque distribution for mechanically coupled axes. Because the parameter structure is consistent across the CDE32 range, engineering effort can be reused when additional axes are added to a machine.
Selection Guidance
When selecting this drive, the key considerations are continuous and peak motor current, motor inductance, feedback type, required fieldbus protocol and the available cabinet space. The 0.95 kVA rating of the CDE32.003.C3.0 suits small and medium sized servo motors and moderate inertia loads. For higher power requirements, other members of the same family provide larger ratings while retaining identical control functionality and parameter structure.
Conclusion
The LTI Motion CDE32.003.C3.0 is a compact servo drive positioning controller that balances small dimensions, flexible interfacing and precise closed loop control. Its configuration coding allows it to be tailored to specific machine requirements, while its diagnostic and monitoring features support reliable long term operation. For engineers maintaining or replicating industrial motion systems built around the LUST LTi Motion platform, the CDE32.003.C3.0 remains a relevant and well understood component.
