SENTOP ENCODERS ---EBS58/EBM58

Earlier this year, we covered our new encoder series: E58. We have since been receiving frequent enquiries regarding its specification. We will showcase the series today with two products from the series, namely the EBS58 and the EBM58.

Earlier this year, we covered the new encoder series in our product lineup: E58. We have since been receiving frequent enquiries regarding its specification. We will showcase the series today with two products from the series, namely the EBS58 and the EBM58.

01 Characteristics of E58 series:

E58 series is a high performance, heavy duty encoder lineup developed by SIBO, with dimensions at around 58 mm. The product range includes: incremental encoders, absolute single-turn encoders, absolute multi-turn encoders etc. The absolute multi-turn encoders achieves multi-turn measurement range mechanically. In terms of signal standard, the series supports a variety of industrial control signals such as incremental, SSI, RS485 and CANbus standards.

The body has a diameter of 60 mm, height of 57.5 mm. The output cable may be positioned on either the side or rear. For convenience of installation, we have three types of screw holes on the flange mounting.

Mechanical Specifications

Housing material: aluminium alloy

Shaft material: stainless steel

Shaft diameter: Φ6/Φ8/Φ10/Φ12 (special and blind hole shafts available)

Activation torque: ≤50mN.m

Mass: 360g

Maximum load: 40N(Axial), 80N(Radial)

Protection: Housing: IP67, Shaft: IP65 (IP67 optional)

Maximum mechanical shaft speed: 12,000 rpm

Vibration rating: 100m/s2, 55Hz-2000Hz (EN 60068-2-6)

Shock rating: 1000m/s2, 6ms (EN 60068-2-27)

02 Naming of EBS58 and EBM58

In terms of encoder type, incremental encoders are named with the initials “EI”. Absolute encoders are named with the initials EA/EB depending on the output. “EA” refers to serial communication, whereas EB refers to serial bus signal (RS485/ModBUS/CANOPEN/USB). “S” stands for single-turn and “M” stands for multi-turn.

For instance, EBS58 is a single-turn encoder with housing diameter of 58mm, outputting serial bus signal. EBM58 is a multi-turn encoder also with housing diameter of 58mm and outputting serial bus signal.

Under these two frameworks, further customization is possible. For example, both blind-hole shaft and solid shaft are available, with shaft diameter and hole diameter customizable. The output cable may be positioned on either the side or rear, or via a connector.

03 Single-turn VS multi-turn encoders

By definition, single-turn and multi-turn encoders varies in terms of measurement range. Single-turn provides measurement range within 360 degrees, output in subsequent turns will be equal to the first turn. SIBO’s EBS58 series offers resolution of up to 14bit, with system accuracy under under 0.022 degrees. Multi-turn encoders not only offers angle measurement, but also the number of revolutions. EBM58 mechanical multi-turn encoder offers up to 4096 revolutions (12bit) of measurement range, and single-turn encoder up to 14bit.

04 How is mechanical multi-turn achieved?

Mechanical multi-turn is achieved via a mechanical gear counter. The counter is still functional without electricity, and the revolution/angle data are available once it is plugged. Therefore, mechanical multi-turn encoders are also known as absolute multi-turn encoders.

Other types of multi-turn encoder, such as incremental multi-turn, battery multi-turn, due to their nature, no longer updates revolutions without electricity. Prior counter is also lost without electricity or if Wiegand ring malfunctions. They require recalibration upon powering on again.

05 How is angle/revolution data converted to output?

SIBO’s multi-turn encoders are capable of measuring 12bit of revolutions and 14bit of angle measurement. If outputted through traditional analogue signal, the signal increments will be very small. Signal will be prone to external noise and is very demanding in terms of measurement technology.

Hence, multi-turn encoders do not use analogue output, but digital output instead. The angle and revolution data is converted to 12bit+14bit serial data, and transmitted according to different serial communication standards. Measurement precision and long distance signal robustness can then be achieved.

06 Other features of EBS58 and EBM58

SIBO’s EB58 encoder series belongs to high end heavy-duty encoder family, which comes with reverse polarity protection, electrical surge protection. They function well under vibration, electromagnetic influence and in damp environments. We have also designed our products with electromagnetic shielding materials to prevent external noises, achieving precision of measurement.

Feel free to further consult us.