Knowledge Center

Encoders and resolvers all provide motion feedback but choosing the right device for your system can be complicated. With over 60 years of motion feedback experience and the most extensive of range of feedback products, Dynapar has helped countless customers find customized solutions that meet their exact requirements while solving their challenges. Below are a collection of articles and resources meant to guide engineers in their encoder selection, written by Dynapar's experienced experts and senior engineers.


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How to Choose the Right Feedback Device

Encoder Output Example

How to Specify the Right Encoder Output Driver

Specifying the correct encoder output is critical to delivering strong encoder signals to your receiving device. Learn how to choose the right encoder output.

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Encoder Resolution vs Accuracy vs Repeatability

Understand Encoder Resolution, Encoder Accuracy and System Repeatability. Learn how to choose an encoder that will properly support your application.

Hub-Shaft Absolute Encoders

Single-Turn vs Multi-Turn Encoders

Single-turn encoders measure position within 360 degrees while multi-turn encoders also track the total number of shaft revolutions. Learn how to choose correctly here.

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How to Specify the Right Encoder Cable

How to specific the right encoder cable based on encoder type to avoid signal noise, cross talk and tips for running longer encoder cables.

AD37S Safety Encoder for Functional Safety

Using Encoders in Functional Safety Design

Safety encoders can monitor speed, direction and position and provide feedback to the controller if conditions meet a predefined unsafe state.

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How to Select Hazardous Duty Encoders

Encoders for hazardous areas where flammable or explosive liquids, gases or vapors are present or are likely to occur. Learn about the different methods of protection.

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How to Specify Resolver Output and Voltage

Learn more about the electrical aspects of resolvers, excitation voltage, resolver output voltage, and transformation ratio, and how they relate to one another.

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How to Specify Resolver Speed and Accuracy

Resolver speed correlates to the number of electric cycles vs a single mechanical revolution of the rotor. Learn how to specify resolver speed and accuracy here.

Types of Position Sensors

How to Choose the Right Position Sensor

Position sensors measure linear or angular position. Learn the how to choose the right position sensor for your application and the tradeoffs for each type.

Application Examples

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How to Measure Position Using Encoders

Learn how to use position encoders track the position of a load either indirectly with a motor mounted rotary encoder or directly with linear encoders.

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How to Measure Angle Using Encoders

Angle encoders measure the rotational of a load in relation to a shaft or point and output pulses that are then processed into angular readings.

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How to Measure Conveyor Speed with Encoders

Learn how to use rotary encoders to measure conveyor speed, calculate RPM and linear distance and how to synchronize multiple conveyors for pick-and-place applications.

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How to Measure Distance with Draw Wire Encoders

Learn how to use draw wire encoders to calculate linear distance with formulas to translate pulses from rotary encoders into linear measurement.

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Video: How to Split an Encoder's Signal using an Encoder Splitter

Learn how to send one encoder's output signal to two separate devices such as a drive and a rate indicator using an encoder splitter.

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How to Measure Linear Distance with Rotary Encoders

Learn how to measure linear distance with rotary encoders, encoder wheels and how to maintain accuracy, avoid slippage and prevent overhung loads.

Case Studies

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World Famous Winemaker Finds A Replacement Encoder in Days

See how a world famous winemaker finds a replacement encoder in days thanks to Dynapar's crossover tool, application engineers, in-house testing and quick delivery.

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Reliable, Heavy Duty Resolver Keeps Steel Mill Rolling

See how Dynapar’s new resolver keeps hot rolling mill rolling for a major steel producer delivering better water resistance for 4.5 times better reliability.

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Customized hall-effect encoder delivers reliable feedback

See how Dynapar’s hall effect encoder delivers reliable feedback for snow plows spreading the exact amount of salt no matter how fast the vehicle goes.

Encoder Issues and Troubleshooting

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Encoder Wiring Best Practices

How to correctly wire and ground an encoder cable to optimize signal quality and avoid common wiring pitfalls such as noise, shaft currents and reverse phasing.

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Video: How to Install a Hollow Shaft Encoder

Learn how to correctly install a hollow shaft encoder including the encoder mounting procedure, aligning the tether point and installing a basket cover.

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Video: How to Install a Magnetic Wheel and Sensor

Learn how to correctly install a magnetic encoder with a separate wheel and sensor including mounting the frame, mounting the pulse wheel and aligning the wheel.

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Video: How to Test an Encoder with an Oscilloscope

Learn how to evaluate and test the signal of an optical or magnetic incremental encoder with an oscilloscope or the NorthStar encoder tester.

Encoder Signal

Troubleshooting Common Signal Issues

Learn how to interpret and diagnose common encoder signal issues to uncover error sources. See quick tips and recommendations to troubleshoot and correct problems.

Extended Encoder Pulses Caused By Loose Encoder

Extended Encoder Pulses

Extended encoder pulses have elongated leading or trailing pulse edges and are commonly caused by mounting issues. See an example and learn how to diagnose the issue.

Encoder Signal Jitter Example

Encoder Signal Jitter

Encoder jitter can be seen as a backward and forward movement in pulse shape that can cause count errors. See an example and learn how to diagnose the issue.

Stepped Encoder Pulses A Shorted to B Signal

Stepped or Stair Shaped Encoder Pulses

Stepped pulses occur when two channels are shorted. The shape of the stair can determine which channels are shorted. See an example and learn how to diagnose the issue.

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Curved or "Shark Fin" Pulses

Shark fin shaped pulses are delays in encoder signal rise time caused by longer cable runs or output driver issues. See an example and learn how to diagnose the issue.

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Encoder Signal Flicker

Encoder signal flickers are erratic jumps in encoder pulse shapes typically resulting from signal interpolation. See an example and learn how to diagnose the issue.