LTi Drives CDE34.010 Positioning Controller 10 A
The LTi Drives CDE34.010 is a positioning controller from the CDE34 series, a drive family originally developed by LUST Antriebstechnik and later marketed under the LTi Drives name. In German speaking markets the device is described as an Antriebsregler, a term that covers both servo drives and positioning controllers. The CDE34.010 combines a 10 A power stage with a closed loop control core, allowing it to regulate current, velocity and position in a single compact unit mounted inside a control cabinet.
Positioning controllers differ from simple speed controllers in that they accept a target position rather than only a target speed. The drive compares the commanded position with the actual position reported by the feedback device and adjusts motor torque to reduce the difference. This closed position loop is what allows a machine axis to move to a defined point, hold that point against load disturbances and repeat the movement accurately over many cycles.
Product Overview
The CDE34.010 operates as a single axis drive. It converts a three phase mains supply into a controlled output voltage and frequency that is applied to the servo motor. The internal power stage uses pulse width modulation with a high switching frequency, producing smooth current waveforms, low torque ripple and quiet motor operation. The control core executes the current, velocity and position loops in a cascade, with each loop independently tunable to match the mechanical characteristics of the connected load.
The 10 A nominal output current places the unit in the medium power range of the CDE34 family. This rating suits servo motors used for feed axes, positioning tables, tool changers, feed rollers and auxiliary axes. The drive is designed for cabinet mounting and can be installed beside other units in a multi axis arrangement, which is common in machines where several coordinated axes must be controlled from one enclosure.
Key Features and Functional Highlights
Feedback support covers resolvers, incremental encoders and absolute encoders, depending on the configuration. Absolute feedback is particularly useful in positioning applications because the drive knows the axis position immediately after power up, without a reference run. Automatic commutation detection reduces commissioning effort when a motor and drive are paired for the first time, and motor identification routines help prevent incorrect parameter entry.
Parameter sets can be stored internally and transferred between units, which simplifies machine replication and spare parts replacement. Digital and analog inputs and outputs provide fast interfacing with machine signals such as enable, limit switches, reference pulses and brake control. A dedicated output for a motor holding brake is available for vertical axes, where the brake prevents the load from dropping when the drive is disabled.
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.
Technical Specifications
The CDE34.010 is designed for a three phase mains connection in the 400 V class. It provides a nominal output current of 10 A with short term overload capability for acceleration peaks. The output frequency range extends across a wide band, supporting standard servo motors as well as 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 EtherCAT, PROFIBUS, PROFINET, CANopen and EtherNet/IP. 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 dynamic moves. This is valuable in applications involving high acceleration, frequent direction changes 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 CDE34.010 is found in a wide 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 CDE34.010 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 CDE34 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 10 A rating of the CDE34.010 suits medium sized servo motors and moderate inertia loads. For higher current requirements, other members of the same family provide larger ratings while retaining identical control functionality and parameter structure.
Conclusion
The LTi Drives CDE34.010 is a positioning controller that balances compact 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 Drives platform, this drive remains a relevant and well understood component.
