January 29, 2020
B&R's new digital output module X20DO4332-1 has integrated pulse width modulation and is a cost-effective alternative to motor modules. In addition, the module offers a dither function that prevents valves from sticking.
Pulse width modulation (PWM) is mainly used for controlling larger loads, such as motors. Instead of using electronics to regulate a continuous input voltage down to the desired motor voltage, the motor is controlled by the width of the switching pulses. This process saves a considerable amount of energy.
With its dither function, the module also prevents valves from sticking. This is particularly common when valves are held for extended times at a constant position, especially in liquids. The dither function oscillates the valve slightly around the position setpoint to prevent it from sticking. The X20 module is equipped with four outputs with three-wire connections and offers a nominal output current of 2 A.
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Cables and wires in industrial robots and other moving machine parts are often required to withstand extreme stresses caused by torsion. Constant repetitive movements put materials under considerable strain. At the same time, operators expect components to function perfectly and reliably throughout their entire service life to avoid disruptions, outages and safety hazards.
For this reason, at HELUKABEL, we simulate intensive and continuous torsion stresses under realistic conditions with our high-tech testing equipment in Windsbach. We have several types of apparatus for doing this because some of our customers, for example those in the automotive industry, have very precise specifications for how a torsion test is carried out. The tests show that our cables and wires withstand speeds up to 1,000°/s, accelerations up to 2,000°/s² and torsion angles up to 720°. Hence, we make sure that each product always meets our customers’ high standards, and that they receive the impeccable quality they rightly expect from us as a leading supplier of cables, wires and accessories for more than 40 years.
What Is Torsion?
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