Products & Solutions
Hazardous Area Encoders
Non Contact Encoders
Condition Monitoring Applications
How Dynapar Onsite Works
View All Accessories
Aerospace & Defense
Off Highway Vehicles
Oil & Gas
Measuring Conveyor Speed
Measuring Angles with Encoders
Measuring Linear Distance
Measuring with Draw Wire Encoders
Measuring Position with Encoders
Service & Support Overview
Competitor Parts List
Discontinued Encoder Guide
Product Manuals & Installation Guides
Featured Crossover Guides
Avtron Encoder Crossovers
DRC Encoder Crossovers
Sick-Stegmann Encoder Crossovers
Allen Bradley Encoder Crossovers
How to Choose Feedback
Encoder Issues and Troubleshooting
White Paper Downloads
Power Point Downloads
How to Specify a Resolver
Draw Wire Encoders
Hall Effect Encoders
Encoder Accuracy vs Resolution
Encoder Wiring Best Practices
Single-Turn vs Multi-Turn Encoders
How to Split an Encoder’s Signal
Troubleshoot Encoder Signal Issues
Encoder signal flicker or jump is an inconsistency in encoder pulse shape and can often be mistaken for jitter. Encoder jitter will usually have a pattern of inconsistency while flicker can be seen more prominently by zooming in and out of the pulse wave but occur somewhat randomly.
Interpolation increases the effective resolution of the encoder by interpolating between data points. The technique can be used to double up an 1800 PPR encoder to act as a 3600 PPR encoder, for example. Interpolation assumes that the two pulses are identical in size, frequency, symmetry, and facing. If there is a deviation in symmetry, for example, the trace will jump when the scope triggers on the first pulse.
Does the signal appear to be a square wave?
Does it flicker or jump with a specific periodicity?
For encoders using interpolation, this is part of normal operation. The question to answer is whether the flicker is out of spec and the encoder datasheet should be consulted to determine if the issue is within the operating specification. If the application requires precise signals or detection of trace amounts of motion, an encoder with direct-read true resolution (not interpolated) may be better suited.