Trade.Information

Hübner in Berlin now presents a compact encoder without bearings

Sensors for speed measurement have to meet special requirements with regard to their operating life if they are used on high-speed drives. Continuously lubricated ball bearings, such as are used for conventional encoders, are no longer practicable at high speeds, because the considerable increase in wear of the bearings leads to a considerable reduction in operating life.
In the form of the HG 6 incremental encoder, Hübner in Berlin now presents a compact encoder without bearings, in frame size 58, that can be run at speeds up to 30,000 rpm with practically no wear. It consists of a rotor with an incremental disk that is fitted onto the drive shaft, and the housing containing the sensor electronics, which is mounted on the drive by means of a servo flange.
The output signals are provided either as TTL or as HTL logic. A combined transport and clamp fitting makes it easy to install the encoder: tightening up a threaded clamping pin fixes the rotor co-axially on the drive shaft, while simultaneously releasing the transport clamp. The system can tolerate up to +/- 1.5 mm of axial play, such as may be caused by thermal expansion of the drive shaft. The HG 6 rotary encoder can be used for applications such as high-speed spindles in textile machinery, where high availability of the components that are involved is mandatory for fault-free operation.