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Encoder Support

Find answers to frequently asked questions, specific information about your products and their usage or special PLC configuration files. If you need a quotation or general information about our products please contact our sales or info[at]faulhaber.com.

FAQ

Which encoder is best for which application?

This decision is usually based on the resolution and accuracy needed as well as the most suitable functional principle (optical/magnetic) and operating temperature range of the encoder types available for the desired motor series.

For which encoder types is a second shaft end available?

If a second shaft end is needed, brushless DC-Servomotors generally use analogue Hall sensors as angle sensors. If needed, encoders are installed downstream of the other add-on components, such as brakes for example.

What line lengths are possible with/without Line Driver (RS422)?
  • Without Line Driver, line lengths of up to 1-2 m are possible with incremental encoders. In individual cases, the function may depend on other parameters, such as the motor PWM and cable installation.
  • With Line Driver and twisted-pair cables, line lengths of up to several tens of meters are conceivable. What matters in this case is the differential evaluation at the end of the line or controller. In addition to this, a connection resistance at the line end may be useful for longer line lengths in order to suppress reflections.
Which encoder types are available from FAULHABER?

FAULHABER offers encoders based on the optical and magnetic functional principles.

Which encoder interfaces are available?

FAULHABER offers encoders with quadrature interface, absolute interface (BiSS-C), analogue and digital Hall signals as well as a sin/cos interface. Other interfaces are also possible on customer request.

Does FAULHABER use standardised encoder interfaces?

Yes, standardised interfaces such as quadrature interfaces acc. to RS422, absolute interfaces acc. to BiSS-C as well as digital Hall sensors are used.

What is the difference between an encoders resolution and accuracy?
  • The resolution of an incremental encoder (4* lines per revolution) is the smallest measurable angle. FAULHABER encoders have an angular resolution of up to 0.009°. 
  • The accuracy is generally a multiple of the resolution. FAULHABER encoders achieve an accuracy of up to 0.1°. The accuracy describes the maximum deviation of the actual position from the set value. For newer products such as the IER3 and IE3, this information is provided in the data sheets.
  • You can find more detailed information on the position accuracy and repeatability in the technical information in chapter Encoders.
Do FAULHABER encoders require additional protective measures against EMC?

Additional protective measures are already incorporated in some encoders, such as the IE3 and IER3. Generally speaking, the specification limits (e.g. supply voltage range) indicated in the data sheets must be heeded. In individual cases, it may be necessary to take additional measures for the customer’s application. What is critical in this respect are primarily voltage peaks on the voltage supply and signal lines, which can lead to a latch-up effect in the sensors and cause their destruction.

Application Notes

Product

Version

Category

Document

Version

Category

pdf

AN 130 - AES Interface Description

Version:  - 

Category:  - 

Choose Language English Deutsch

pdf

AN 133 - Installation of the Multiturnencoder AEMT-12/16 L combined with MC V3.0 controller family

Version:  - 

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pdf

AN 136 - Block Commutation - with Digital Hall Sensors - with Absolute Encoder

Version:  - 

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pdf

AN 144 - Quadrature interface

Version:  - 

Category:  - 

Choose Language English Deutsch

pdf

AN 146 - Further information on IEH2 and IEH3

Version:  - 

Category:  - 

pdf

AN 147 - Definition of the encoder signal criteria

Version:  - 

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pdf

AN 162 - Analog Hall Sensors

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AN 163 - Digital Hall Sensors

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Category:  - 

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In this new FAULHABER Drive Time video, our expert Andreas Wagener describes how different encoder systems influence the control loop.

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