What Should I Consider When Installing an Encoder Tether?

Posted by London Rhodes on Aug 27, 2021 2:10:16 PM

Encoder tethers are designed and engineered to allow the encoder to float with the run-out of the motor shaft. If the tether is bolted too rigidly to the motor, then run-out from the motor can damage the encoder bearings. It is critical to use the parts provided with the encoder during installation to ensure the tether is properly placed. Avoid bending the tether from the position in which it is provided from the factory.

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Topics: Installation, Troubleshooting

Why are Tethers Important for Encoders?

Posted by London Rhodes on Aug 27, 2021 2:01:41 PM

Without a functional tether, the wobble from the motor shaft will create additional wear on encoder bearings causing them to fail. Friction from bearing failure will cause encoder electronics to overheat.

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Topics: Installation, Troubleshooting

What is an Encoder Tether?

Posted by London Rhodes on Aug 27, 2021 1:59:00 PM

A tether is an anti rotation device mounted between motor and encoder to ensure the encoder remains stationary while the motor is running.

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Topics: Installation, Absolute Encoders, Troubleshooting

What Are Dynapar Phenolic Measuring Wheels Made Of?

Posted by London Rhodes on Aug 27, 2021 1:51:23 PM

In order to provide manufacturing flexibility, the 16002070177 Measuring Wheels can be made from Garolite G10, CE, LE or XX. Depending on the grade the color could be green, brown or black. We also offer rubber measuring wheels.

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Topics: Measuring Wheels

How Many Shaft Positions Exist on Absolute Encoders?

Posted by London Rhodes on Jul 29, 2021 10:33:47 AM

You can calculate the number of shaft positions on your encoder with the following equation: 2x where X = the resolution of your absolute encoder in bits.

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Topics: Installation, Absolute Encoders, Encoder Signals Output, Troubleshooting

How to Calculate Frequency Response?

Posted by London Rhodes on Jul 29, 2021 10:30:48 AM

RPM x PPR / 60 = Frequency Response in Hertz

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Topics: Troubleshooting

What Should I Consider When Converting DC Tachometers to Encoders?

Posted by London Rhodes on Jul 29, 2021 10:27:16 AM

To convert a DC tachometer to an encoder, you should consider the brackets. Beyond mechanics, you should also consider what ppr, input and output voltage, and the bore size of the motor being measured.
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Topics: Installation, Troubleshooting

What Are Critical Aspects to Specifying Resolvers?

Posted by London Rhodes on Jul 29, 2021 10:24:03 AM

The five most important factors to consider when specifying the proper resolver for your application include: input voltage, input current, transformation ration, size of resolver, speed of resolver.

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Topics: How to Choose An Encoder

How Can I Reduce Jitter On My HD15 Display?

Posted by London Rhodes on Jul 29, 2021 10:13:02 AM

Mechanical and electronic hand tachs still average out (smooth) the counts.  But displays, depending on how they are programmed, are instantaneous so one per rev (or even partial rev) variations in speed can be displayed.  If the bounce rate of your HD15 display  is undesirable, reduce the update rate or increase the sampling time.

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What is a Sinking or Sourcing Input?

Posted by London Rhodes on Jun 18, 2021 1:35:42 PM

Sinking and Sourcing inputs simply refer to the current flow in a transistor. This means that they require a voltage and a load to operate. A sinking input requires the voltage and load to be present before connecting it to the circuit. This means that it is "sinking" the current to ground for the circuit. A sourcing input must be before the load in the circuit. This means that it is "sourcing" the current to the circuit. Voltage and a load must be present in either case to detect a voltage change at the input. The same is true for sinking or sourcing outputs.

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Topics: How to Choose An Encoder, Encoder Signals Output