Rotary encoders for reliable AGV operation

The high-precision HTx36E True-Power-On Hall-effect rotary encoder from MEGATRON eliminates the need for this procedure, continuing to count encoder shaft revolutions even when no power is supplied. Position information is therefore retained even if the power supply is interrupted.

The HTx36E’s digital signal processing relies on magnetic, gradient-based sensing, making the sensor largely insensitive to electromagnetic influences and temperature fluctuations. The rotary encoder is available as an absolute encoder with up to 16-bit singleturn and 43-bit multiturn resolution. Alternatively, an incremental encoder version with 1 to 16,384 pulses per revolution is available.

MEGATRON’s ETA25PM multiturn rotary encoder allows the effective electrical angle of rotation and the direction of rotation to be adapted to the application. The factory default is ten revolutions (3,600°, CW). For other requirements, measuring ranges of up to 72,000° and the direction of rotation (CW/CCW) can be individually configured. Parameters can be set either at the factory or directly during installation using a teach-in function.

With a service life of over 100 million revolutions, the ETA25PM’s plain bearing is designed even for applications with continuous rotation. The encoder has a housing just 25 mm in diameter and is available with shaft diameters of 6 or 6.35mm. An optional shaft seal provides an IP66 protection rating.

MEGATRON offers the ETx25K series of kit encoders for particularly small automated guided vehicles. With an installation depth of just 8mm, the rotary encoders in their plastic housings require very little space. Microprocessor-assisted Hall-effect technology enables contactless detection of the shaft position. The sensor is enclosed in a sealed housing with an IP67 protection rating. For functionally critical applications, MEGATRON supplies the rotary encoder with two separate power supplies, galvanically isolated outputs and redundant electronics.

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