What is meant by Rotary Incremental Encoder Index Pulse “Gating”?

May 7, 2020

An INDEX PULSE is a digital signal that is generated from an incremental encoder on an individual output channel, once per revolution. This unique pulse may be used for several purposes: In conjunction with a counter, it can be used to track the total number of shaft rotations. It may...

Finding the Index Pulse of an Incremental Encoder

October 1, 2014

The index pulse, often also called “Z” or “Marker pulse”, of an optical incremental encoder is a once per revolution digital pulse that is used for homing or count verification of incremental signals. In the QD145 and QD200 series of encoders, the index pulse fires when the mark on the...

Finding the Index on an Incremental Encoder with a Digital Multimeter (DMM)

August 10, 2014

Sometimes you don’t have the right tools to do the job. Let’s say you needed to identify where the index pulse was firing on your incremental encoder, but you left your oscilloscope in your other jacket pocket, and now all you have on hand is a Digital Multimeter (DMM). Well...

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