Lika's new intelligent RD1xA rotary actuators gain motor brake

Von: Lika Electronic  02.05.2012
Keywords: Meß und Regeltechnik, Automatisierung, Elektromechanische Komponenten und Geräte

Recently introduced to markets, intelligent RD1xA rotary actuators add new valuable benefits and gain motor brake. New RD12A models are today equipped with an integrated electromagnetic power off brake (permanent magnet) operated at 24VDC capable of a maximum braking torque between 4.8 Nm and 19.2 Nm, according to gears. The brake is designed to activate as soon as the motor comes to a stop and safely protects from uncontrolled movements, especially in mobile stops and vertical mounting installations and axes. RD12A rotary actuators come in a robust and compact design (degree of protection IP65, 14 mm hollow shaft) and integrate a 31 W BLDC brushless motor fitted with planetary gears (T48, T24 and T12 gear ratios available) and a real 20-bit high-accuracy (±0.9°) multiturn encoder installed in the output axis and therefore not affected by backlash errors of the gears. Nominal torque is up to 5 Nm (starting torque up to 12 Nm). The controller, fully developed by Lika Electronic, offers two cascade control loop systems, the position loop cycle performed at every 1 ms and the current loop cycle performed at every 200 μs. The internal trajectory generator (boasting a 64-bit double precision) allows the operator to set new target position even on-the-fly. Controls on overtemperature, overcurrent, undervoltage and bus communication failure (because of a broken or disconnected cable or a faulty wiring) are further implemented. RD12A positioning units can be easily integrated into fieldbus networks thanks to the wide choice of industrial bus protocols: Profibus-DP, CANopen DS301 and Modbus RTU. In addition, Profibus and CANopen models are equipped with a RS-232 service interface. RD12A rotary actuators also encompass a large number of key features offered at no charge. Among the others: separate power supply for motor and controller; Preset and Jog buttons to manually move and calibrate the unit; incremental jog function; general purpose I/Os; LEDs meant to show visually the operating or fault status of the interface and the device; DIP switches to set the node ID, the baud rate and the termination resistance; software tool to configure and test manually the unit via USB port including boot-loader feature to upgrade the DRIVECOD unit firmware. New RD12As can be easily fitted into equipment with constrained and tight mounting space and even for modernizing existing systems as the mounting assembly is exactly the same used for digital position indicators and handwheels commonly installed in manual adjustable shafts. They can be used in a wide range of applications in any industrial sector and are suitable to drive positioning and auxiliary axes such as in mould changers, mobile stops, tools changers, filling machines, suction cups motion units, spindle positioning devices, conveyors and packaging & woodworking machineries, among others. At any rate a single command can provide multiple precise adjustments in just one cycle and a very short time.

Keywords: Automatisierung, Drehgeber, Electronic, Elektromechanische Komponenten und Geräte, Encoder, Encoder Absolute, Integrierte Stellantriebe, Intelligente Motoren, Meß und Regeltechnik, Motion Control, Multiturngeber, Positionierung, Spindelpositionierung,

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