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How Should Users Connect the Fault Output From a HS35iQ to a PLC?

Posted by London Rhodes on Jun 28, 2022 9:53:27 AM

In this example the fault output from an HS35IQ encoder was connected to a Rockwell PLC. A simple single line of ladder logic was used to read the fault line from the encoder and turn on an LED when a fault is present. The LED is just an easy way to indicate the fault was successfully read from the encoder but other solutions such as alerting maintenance are possible by utilizing the fault output function.

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Topics: HS35iQ Encoder

What are the Advantages of a Bearingless Encoder?

Posted by London Rhodes on Feb 2, 2022 8:37:08 AM

Encoder failure is most commonly attributed to bad bearings. Therefore, having a bearingless encoder eliminates that point of failure. Bearingless encoders are designed with magnetic technology that is less susceptible to dirt and moisture issues than bearings.

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Topics: How to Choose An Encoder, Magnetic Encoders

What are the Benefits of Hubshaft Encoders?

Posted by London Rhodes on Feb 2, 2022 8:14:20 AM

Hubshaft encoders are designed to allow the motor shaft to partially enter the encoder, saving space where it is limited.

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Topics: How to Choose An Encoder, Installation

What are the Benefits of Shafted Encoders?

Posted by London Rhodes on Feb 2, 2022 8:01:54 AM

Shafted encoders are designed to be isolated from the motor for protection against shock and vibration and straight currents.

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Topics: How to Choose An Encoder

What is a Hollowshaft Encoder?

Posted by London Rhodes on Jan 19, 2022 8:29:55 AM

Hollowshaft encoders allow the motor shaft to pass completely through and are secured by a shaft collar. This mounting style is easier to install and requires less space than a shafted encoder. Flexibility from the tether allows the encoder to float with the movement of the motor shaft, alleviating wear and tear on the bearings. The shaft collar is electrically isolated from the motor for protection against stray motor current.

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Topics: How to Choose An Encoder, Absolute Encoders

What are the Encoder Mounting Options?

Posted by London Rhodes on Jan 19, 2022 8:14:21 AM

There are several types of encoder mounting styles to choose from when selecting an encoder for your application. Typically, you will choose between hollowshaft, shafted, hubshaft, and ring (or c-faced) mounting styles for encoders. Hollowshaft encoders allow the shaft of the motor to go through the encoder, and secures to the shaft by the shaft collar. Shafted encoders attach to the motor with a flexible coupling or possibly a belt (gear). Hubshaft encoders mount to motor shafts similarly to hollowshaft encoders. The difference in the hubshaft is that the motor shaft can only go about halfway into the encoder rather than completely through. Lastly, the ring (c-faced) option allows the encoder to bolt directly to the flange of the motor for bearingless designs. You will need to choose the mounting style that best suits your motor or application.

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Topics: How to Choose An Encoder, Installation, Absolute Encoders, Optical Encoders, Magnetic Encoders

When Should You Use a Coupling to Mount Encoders?

Posted by London Rhodes on Jan 19, 2022 7:44:44 AM

Couplings mechanically and electrically isolate the encoder from the motor. This separation helps avoid encoder signal errors such as miscounts or extra counts by reducing noise in the encoder. In addition, electrical isolation prevents damage caused by current from the motor.
Couplings also allow the encoder to compensate for shaft misalignment. Cutouts on the coupling allow flex to occur in the coupling rather than in the motor shaft. The runout from the shaft is absorbed by the coupling to prevent physical damage to the encoder.

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Topics: How to Choose An Encoder, Installation, Troubleshooting

What is a Single- Ended Output?

Posted by London Rhodes on Jan 19, 2022 7:26:20 AM

Differential signals are not included in a single- ended output. This type of output will only provide A,B and Z signals. Single- ended outputs are common in older systems and can be more prone to noise than differential signals.

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Topics: How to Choose An Encoder, Encoder Signals Output

How Do Reflective Encoders Produce a Signal?

Posted by London Rhodes on Sep 29, 2021 2:00:50 PM

Reflective encoders produce signal based on the reflection of light. The motor shaft and encoder rotate in tandem. The code wheel has a pattern of reflective and non-reflective surfaces. As the light shines down on the rotating code wheel, it produces a predictable pattern of light and down. An internal sensor detects this pattern and produces digital pulse.

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Topics: How to Choose An Encoder, Encoder Signals Output

How Do Magnetic Encoders Produce a Signal?

Posted by London Rhodes on Sep 29, 2021 1:58:27 PM

Magnetic encoders use a permanent magnet and a Hall Effect, or magnet resistive device, to produce a change in voltage or electrical resistance in the presence of ferromagnetic material. This change will occur in the form of a gear tooth (in a rotary encoder) or a metal band with slots (in a linear encoder). Tis type of sensor will work down to zero speed, and is available in both rotary and linear forms.

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Topics: How to Choose An Encoder, Encoder Signals Output, Magnetic Encoders

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