Dynapar offers a three piece solution for conveyor systems including an encoder, measuring wheel and bracket. A few brackets are specifically designed for use on a conveyor.

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.

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.

An absolute encoder has each position of the revolution uniquely numbered. This means that instead of an output of pulses, you get an output that is a specific value in a binary format. This is very useful when exact positioning is a must. Since each location in an absolute encoder's revolution is a unique binary value, if the power should be lost, the actual value of the position will be known when power is restored. The exact position will be known even if the controller loses power and the process is moved.

A zero speed indicator is a separate output used as an alarm when the speed of the application drops below a certain frequency, not when zero speed occurs. The zero speed is not detected, only the drop below a set frequency can be detected. This is useful when the speed of the application is critical and must be monitored.

When choosing the PPR value of the encoder, please keep a few simple rules in mind. Make sure that you do not choose a PPR that will cause you to exceed the maximum frequency of your controller or encoder. Try to choose a PPR that is close to the value you wish to display, this eliminates or reduces the need for a calibration constant. For example, If you wish to display 12 inches for every revolution choose a PPR of 12. If you wish to display 12.00 inches, choose 1200 PPR. However, do not make the mistake of forgetting the multiplication of the controller's input. Most controllers have X2 or X4 logic. If it is X2 logic, this would change your PPR to 600 for a 12.00 display; and the PPR would be 300 for X4 logic. These choices give you one pulse for every one unit of measurement desired. It is important to remember the frequency that your PPR will create. When choosing the PPR, do not choose one that will result in a higher frequency than the encoder can handle at your max. speed. The reverse is also true, do not choose too low of a PPR, that your controller cannot recognize the signal. Try to choose your PPR so that your calibration constant is between .5 and 1.

How do I set my Calibration Constant?
The calibration constant can be simplified by simply selecting the correct Pulses Per Revolution (PPR). Once the PPR has been selected or is known simply follow the formula presented in the Technical Manual. When choosing your calibration constant remember the closer to 1 the better. The value of the calibration constant is your best resolution per pulse of the encoder.

Quadrature output refers to the phasing of the output signals. When the output signals, signal A and B, are 90 degrees out of phase with each other, the output is said to be in quadrature. This is the only thing that the term quadrature implies. (see What is a Quadrature output?)

x4 Logic denotes how the controller will interpret the signal that it is receiving. This is done by translating each edge of the pulse detected for the A and B channel into its own pulse. This translation takes place in the controller and not at the encoder.

This means if you order a quadrature encoder with 120 pulses per revolution, the output of signal A and B will be out of phase by 90 degrees. It does not mean that for every one revolution that the encoder makes you will get 480 pulses. The multiplication of the pulses only occurs at the controller

Along with the industry proven features that the original Rim Tach 8500 is known for, the NexGen RT8 offers users advanced feedback technology. The NexGen RT8 boasts sensors that provide up to 0.075” of air gap, over 50% more than competitive models and an expanded resolution up to 2400 PPR. The RT8 circuitry was redesigned to offer on-board diagnostics with LED and alarm output. Also, an optimized pulse wheel offers greater shaft holding force and ease of assembly

A resolver is a mainly mechanical device that provides an analog signal back to the encoder. Resolvers are ideal for applications where high temperature, high shock and vibration, and dust/ dirt are factors. Encoders differ from resolvers due to the fact that they are electrically powered devices devices and provide digital signal back to the encoder.

When selecting an encoder for applications in the food and beverage industry, an IP67 rated encoder is essential to withstand routine wash downs. Chemicals and other liquids involved in wash downs are very harsh on electrical devices. Stainless steel enclosures help ensure a sterile environment and continuously reliable feedback operation.