SSI in a 36 mm / 58 mm housing Single-/Multiturn (14/40 bit) Ground-breaking technology with 32 Bit processor Very high shaft loading, IP67 EnDra -Technology: no gears, no battery 05/2010Absolute encoders WDGA, solid and hollow shaft ... magnetic, autonomous - thanks to EnDra Operating principle of the EnDra technology for the multiturn: The singleturn and multiturn absolute encoders, series WDGA, possess new, outstanding qualities thanks to their patented The Wachendorff WDGA encoders do not require mechanical EnDra technology: gears to detect the number of revolutions and the direction of rotation. The revolutions are determined by means of an energy wire (EnDra ) instead: in the wire a permanent magnet accumu- Free of wear no gears lates enough energy, that the informationRevolutio and Environmentally friendly no batteryDirection of Rotatio for a defined position is transmitted to the High energy efficiency low power consumption evaluation electronics. An external energy feed, for example Very compact construction using a battery, is not required. The result is that this patented system is able to work fully autonomously. www.wachendorff-automation.com/wdgassi With their high resolution of 14 bit singleturn and 14 bit + 40 bit multiturn, they are ideal for those applications, where high mea- suring accuracy as well as mechanical ruggedness is important. The interface provides the evaluation electronics with the com- plete position value, consisting of the combination of the single- turn position with the corresponding multiturn position based on the number of revolutions. The resolution of the singleturn posi- tion is 14 bit (16384 steps per revolution). The multiturn can handle up to 40 bits, depending on requirements. Despite its extremely high resolution, the maintenance-free encoder has need of neither gears nor back-up battery. This guarantees a long service-life for the mechanics and helps to protect the environment. The following examples conduce to make the enormous capabi- With its exceptionally high shaft loads of up to 220 N radial and lities of the WDGA absolute encoders even clearer: 120 N axial, it will work reliably and accurately for years to come. Using a measuring wheel with a circumference of 500 mm it is possible to make an absolute measurement of the total circumference of the earth, approx. 40,076 km, with a resolution of around 120 m. If you run our WDGA absolute encoder 24 hours a day, 7 days a week, at its max. speed of 12,000 rpm, it will not reach its final value until around 11 years. And all of this absolutely autonomously. Quick in operation: The WDGA absolute encoders are equipped with a two-colour LED (red/green). Thanks to the differentiated change in colour and the varying blinking frequencies of the LED, important sta- tus signalling can be read off directly. The WDGA absolute enco- ders can thus be integrated quickly and easily into the existing application.