Lust LTi Drives CDE32.008.W2.2.BR Positioning Controller

The Lust LTi Drives CDE32.008.W2.2.BR is a positioning controller from the CDE32 series. It is configured with the W2.2 hardware variant and includes the BR braking function. The unit operates with software version V3.10-03. The controller is designed for precise closed loop control of servo motors in industrial machinery. Its compact housing allows dense mounting in a control cabinet, and it can be combined with other drives in a multi-axis system with a shared DC bus.

Series and Model Identification

The CDE32 series is part of the Lust LTi Drives motion control portfolio. The 008 model identifies a specific current and power class within the family. The W2.2 suffix describes the hardware revision and option set. The BR designation indicates braking functionality, which allows regenerative energy to be managed through a braking resistor. Software version V3.10-03 defines the functional generation and revision loaded in the unit.

Positioning Functions

As a positioning controller, the drive can execute point to point moves and can follow a position reference from a higher level controller. Electronic gearing and cam functions may be available depending on the firmware and option set. Position limits, following error limits, and homing routines are configured during commissioning. These functions allow the drive to be used in machines that require accurate synchronisation between axes.

Control Architecture

The controller uses a cascaded control structure with a current loop, a velocity loop, and a position loop. The current loop regulates motor current with a short cycle time, producing fast torque response and low torque ripple. The velocity loop stabilises speed against load disturbances. The position loop uses feedback to close the position error and to ensure accurate stopping. Gains are adjustable, and several parameter sets can be stored for different machine modes.

Feedback Interfaces

Resolver feedback is supported for robust operation in harsh environments. Incremental encoders provide high resolution for accurate speed and position control. Absolute encoders allow the axis position to be known immediately after power up, which removes homing routines. Motor temperature sensors can be evaluated so that the drive reduces current when the winding approaches its thermal limit.

Braking Function BR

The BR option provides braking capability. When a motor decelerates a high inertia load or a vertical load, energy returns to the DC bus and raises the bus voltage. The braking function connects an external braking resistor so that this energy is converted into heat and the bus voltage remains within limits. This prevents overvoltage trips and allows controlled deceleration profiles.

Power Section and DC Bus

The output stage converts DC bus voltage into controlled motor current. Protection circuitry monitors current, voltage, and temperature continuously. When several drives share a DC bus, braking energy from one axis can be used by another axis that is accelerating. This reduces the energy that must be dissipated in a braking resistor and improves overall system efficiency.

Input and Output Signals

Digital inputs handle enable, fault reset, and limit switch functions. Digital outputs report ready state and fault condition and can control a motor brake. Analog inputs accept external speed or torque references. Depending on the W2.2 option set, a fieldbus or serial interface may be available for cyclic communication with a higher level controller.

Software V3.10-03

Software version V3.10-03 provides the parameter management, motor identification routines, control loop tuning tools, and diagnostic functions of the controller. It includes fault logging, trace recording for current, speed, and position signals, and parameter set storage. Matching this version during replacement or upgrade is important for maintaining machine behaviour.

Protection and Diagnostics

Protection includes overcurrent limiting, short circuit detection, ground fault monitoring, overvoltage and undervoltage supervision, and overtemperature monitoring. Motor overload protection uses a thermal model based on the current profile. Faults are displayed on the front panel and stored in the fault history together with operating conditions.

Applications

The CDE32.008.W2.2.BR is suitable for packaging, printing, textile, handling, and assembly machinery. It can be used for feed axes, positioning tables, rotary indexing, and winding drives. The braking function makes it suitable for applications with vertical axes or high inertia loads. The compact size makes it appropriate for machines with limited cabinet space.

Installation Practice

Mount the drive vertically with clearance for airflow. Use shielded motor cables and bond the shield to cabinet ground. Route signal cables separately from power cables. Verify that the DC bus and braking resistor wiring follows the specified cross sections and torque values. Confirm that cabinet cooling is sufficient for the total losses of all installed drives.

Maintenance and Service

Inspect cooling paths and fans at scheduled intervals and clean dust from air inlets. Verify terminal tightness. Keep parameter and firmware records available so that a replacement unit can be restored quickly. Review the fault history to detect recurring overload or overvoltage events.

Conclusion

The Lust LTi Drives CDE32.008.W2.2.BR is a positioning controller with braking function and software V3.10-03. It offers flexible feedback support, robust protection functions, and straightforward integration into multi-axis systems. With correct selection and commissioning, it delivers accurate and reliable motion in industrial machinery.